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POLISHING / BUFFING WITH GRINDER

Discussion in 'Detailing' started by AGU-TURBO, Mar 25, 2011.

  1. AGU-TURBO
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    AGU-TURBO Audi a3 1.8t AGU

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    [Mar 25, 2011]
    hi i wanted to get all the swirl marks out of my a3 using meguiars scratch-x. i descided to get used to it first before i attept the car so i did the van with t-cut first, well i only managed to do the bonnet and my grinder was burning out, i was using a medium sponge (blue). i thought my grinder was to small but, ive had a look on ebay and they sell the 5' grinders in a kit for detailing. my grinder is a performance power (B&Q) 860w. what am i doing wrong or what sort of wattage grinder do i need?
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  3. Broken Byzan
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    Broken Byzan Photographic Moderator Staff Member Moderator VCDS Map User

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    [Mar 25, 2011]
    PUT THE GRINDER DOWN AND STEP AWAY FROM THE PAINT.

    Its about 3 times too fast and will litterally melt the paint
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  4. tdia4
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    tdia4 TDIPOWARRR

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    [Mar 25, 2011]
    When you say grinder you dont actually mean a grinder as in a angle grinder?

    You need either a DA or Rotary.
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  5. tdia4
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    tdia4 TDIPOWARRR

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    [Mar 25, 2011]
    Get yourself a silverline Rotary, they cost about £40, thats what I payed for mine, they are abit on the heavy side but thats shown in the price.

    Also dont be using t-cut, get yourself some proper polish, 3m, menzerna, meguiars etc and if I were you I would get a test panel first before attacking your Audi.
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  6. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator VCDS Map User

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    [Mar 25, 2011]
    Yeh, some grinders have adjustable speed, but you really want to be using a proper polisher, as the speed ranges are totally different.

    A Grinder will run at around 11000rpm at full speed, a machine polisher will run between 900 and 3000rpm (usually adjustable). The machine polishers also have much larger housings/fans, and slightly bigger motors to cope with the heat caused by polishing.
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  7. AGU-TURBO
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    AGU-TURBO Audi a3 1.8t AGU

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    [Mar 25, 2011]
    please tell me the difference between a rotary and a angle grinder, it's also variable speed so it won't melt the paint and they also do the same grinder in a case with buffing and grinding pads
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  8. AGU-TURBO
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    AGU-TURBO Audi a3 1.8t AGU

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  9. Mr.G
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    Mr.G Active Member

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    [Mar 25, 2011]
    LOL....crazy stuff!
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  10. FranA3
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    FranA3 events moderator Regional Rep

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    [Mar 25, 2011]
    polishing with a grinder are you serious , they are WAY WAY WAY too fast so are more than likely to ruin your paint get a rotary buffer they are cheap enough but dont use a grinder they are the tools of pikeys
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  11. AGU-TURBO
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    AGU-TURBO Audi a3 1.8t AGU

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    [Mar 25, 2011]
    lol, yeh ive just ordered a rotary. well i only tryed it on my van on a slow speed and did a fantastic job but the motor was getting seriously hot. i wouldn't go anywere near my a3 if havnt tested it on the old van first lol
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  12. FranA3
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    FranA3 events moderator Regional Rep

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    [Mar 25, 2011]
    a grinder isnt built for that kind of work buffers are on for long periods of time so have special motors and big fans so they stay cool , but glad you have ordered one , if your unsure how to use it watch a few video's on youtube first just so you dont do any damage to your paintwork
    #11
  13. maars
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    maars Full speed ahead

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  14. bigblokey0
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    bigblokey0 Member

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    [Mar 28, 2011]
    I to have used a variable speed angle grinder and it did work ok but got very hot, what buffer would you recommend ?
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