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Spray paint

Discussion in 'A3/S3/Sportback (8P Chassis)' started by Karcsi, Apr 24, 2006.

  1. Karcsi
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    Karcsi Member

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    [Apr 24, 2006]
    Is this stuff supposed to match the paint on the car? /ubbthreads/images/graemlins/confused.gif

    I managed to stick a deep 3 inch scratch into my nearest front wheel arch parking into my parent's garage. I cleaned it up, built it up with primer, and then sprayed it with about 4 thin layers of Mauritius blue spray paint from the dealer - of course after working down the primer to a smoothish finish. I've also worked down the paint with fine wet and dry for a smooeth finish. But the result is the mauritius blue is, well see for yourselves:

    [​IMG]

    [​IMG]
    [​IMG]

    Do I need to T cut it to bring a shine to it? Will lacquer solve the mis-match issue? Or do I need to face facts, that a spray paint will never match the factory paint on a car? Avus Silver matched my wheels perfectly when I repaired them, so why not the body?

    Any suggestions (other than, keep the day job and get a professional in /ubbthreads/images/graemlins/grin.gif) gratefully received.
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  3. god_thats_quick
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    god_thats_quick Numptie of the highest order

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    [Apr 24, 2006]
    I think you need to lacquer it then try polishing it all over the area before getting too worried, looks like a good job so far!
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  4. Karcsi
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    Karcsi Member

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    [Apr 24, 2006]
    Thanks. I went nuts though - took the whole thing off and started again: I'm a bit of a perfectionist / obsessive!

    I'm sure I can get it perfectly flat and then apply the paint on a thinner strip and then feather it out. Plus apply the paint a little thicker, as I need the thickness to work back to a flat finish before the lacquer. That's the theory. A few more goes and surely it will be perfect. Even the experts weren't born like it!
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  5. dummi
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    dummi smoking a6

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    [Apr 25, 2006]
    it looks good for a spray paint job
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  6. Karcsi
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    Karcsi Member

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    [May 2, 2006]
    I've redone it, and will post pics in due course. But it isn't how I expected. Why doesn't the spray paint match? It's a standard factory colour, so why is it so far off.

    I've been apply very light coats, and feathering it outwards as I go - moving the masking tape further out as which reach coat. Although it blends in quite nicely, the colour is still miles off the original. The same is true for the dolphin grey spray paint I used to repair my father's car - it's duller and lighter.

    Should I be applying a heavy coat instead and then working down the edges? That's nearer what I did with the wheels, and they came out near perfect.
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  7. stevethejambo
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    stevethejambo Member

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    [May 2, 2006]
    Just because it is a standard factory colour does not necessarily mean it will match. My family runs a bodyshop, and each factory colour may still have 2/3 different tones, which will only be matched by a good spray painter if that helps.
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  8. stevethejambo
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    stevethejambo Member

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    [May 2, 2006]
    So I guess I was trying to say get the professional in if you want the job done right /ubbthreads/images/graemlins/smile.gif
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  9. Karcsi
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    Karcsi Member

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    [May 5, 2006]
    Halfords mix paint on the spot (somthing like £13 for 500ml). And there are few internet companies that mix according the manufacturer's code and post it to you (about the same price). Anybody with experience of them? I'm guessing the colour will be the same. At least its more for your money - the 250ml can you get from Audi (plus lacquer) is £11.20.
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  10. stevethejambo
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    stevethejambo Member

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    [May 7, 2006]
    Still though - the manufacturers code does not been that the match will be correct. Ive got the same colour of car as you. If I remember, Ill look at our mixing data on Monday when I am in work. It is most likely that there will be about 3/4 different variations of the mauritaus blue factory colour. When we mix, we have to do tone cards and then pick the best match from that. There are all sorts of reasons why there are so many matches and paint mixing is becoming a complete nightmare. Our painter is one of the best in the business, and I mean that honestly.

    Many bodyshops now have one experienced spray painter who simply spends all day matching colours - it really is getting that bad.

    So all Im trying to say is I wouldnt trust the mix from Halfords or any internet company.

    Hope that helps.
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  11. Karcsi
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    Karcsi Member

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    [May 7, 2006]
    Thanks very much Steve. That would be useful.

    Sounds like a nightmare. You'd think that the drive for companies to be efficient there would be one mix for each colour.
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  12. stevethejambo
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    stevethejambo Member

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    [May 7, 2006]
    I dont really know the true explanation mate, it gets complicated. I think it comes down to different productions runs etc. You would not notice it if you compared two cars of the same colour, but when you put a different tone on a car, its quite noticeable.

    I remember a few weeks ago, we had to paint a silver mondeo - there were NINE different variations of the same paint code.

    Luckily we have a system which is pretty good and accurate, its just a pest trying to actually match it.
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  13. Karcsi
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    Karcsi Member

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    [May 7, 2006]
    Do you know of a company in the south (I'm in Bedfordshire) that would be able to do a reasonably good job matching the colour?
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  14. stevethejambo
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    stevethejambo Member

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    [May 7, 2006]
    Sorry, dont really know any bodyshops down South. We are only an independent in Edinburgh so we dont really have any connections at all. I guess you just need to put a word around and find out a good place.
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  15. tinka
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    tinka Guest

    [May 7, 2006]
    i would imagine the only way you will ever get a good match,is by doing the whole panel,

    or find out from your local dealer,who does their bodywork.
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  16. stevethejambo
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    stevethejambo Member

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    [May 8, 2006]
    Hi mate,

    I checked our system today and also had a word with the spraypainter.

    Basically, he said Halfords etc do not give an exact match. It is very difficult to get an exact match, as it depends on the formulation in the factory, and how much paint is used on the car - this can vary in each batch hence the different tones.

    On our system, there are two different variations of the mautitaus blue colour, with two shades. Each are classed under the same paint code.That makes four different possibilities. He said that they would start with the base colour, spray it on a testing card then tone it based on whether it is lighter or not.

    Finally, our paint company also produces formulations which on site technicans match when bodyshops encounter difficulties - we found another two of them.

    So I guess all Im saying is that you are not going to get an exact match by using the methods you have. The panel will also need to be blended as well.

    Hope that helps!

    Steve
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  17. Karcsi
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    Karcsi Member

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    [May 8, 2006]
    Thanks for the help.

    So, even if I take my car to a company like yours to give me the best chance of matching the paint, it will still only be passable unless I paint a larger area to allow blending which the naked eye would not be able to resolve.

    I think I've managed a reasonable job now (only took 6 goes and 150ml of paint!). It was a 1mm wide gash, and the painted area is more like 40mm to allow a decent amount of blending.

    I also got some brown primer instead of ligt grey, which means I didn't have to use so many layers of paint, which may have helped.

    I tried just painting the scratched area (after filling with primer), but that was far worse.

    Perhaps if I'm bored over the summer, I'll try blending over a larger area and see what results.
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  18. bobtooke
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    bobtooke New Member

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    [May 9, 2006]
    IMO you'll never get a metallic or pearl to match exactly when patched. So much depends on not only the colour match but also the type and angle of spray gun used. The metallic particles extit the gun nozzle at a certain angle and are different for each spray gun, sprayer and spray method. The paint will reflect differently due to the met particles being at a different angle to the surrounding paint.
    The only way for it to look right is to paint the whole panel. A PITA but the only way!
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  19. dik
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    dik Member

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    [May 10, 2006]
    You`ll defn need to laquer it to get the shine back, plus blending in a pearl or metallic paint is very difficult and most people will spray the entire panel otherwise you can see the edges easily.
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  20. Karcsi
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    Karcsi Member

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    [May 10, 2006]
    Thanks guys. When the dealer out a minor scratch in my driver's door - 3cm long, a couple of tenths of a mil wide and deep - I wondered why they resprayed the whole door. Now I know! Although, I haven't noticed a mismatch between the door and the surrounding bodywork, which is lucky.
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  21. dik
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    dik Member

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    [May 11, 2006]
    sounds like your scratch was polished out, i.e. the scratch was only in the laquer layer and not in the paint.
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