Anyone running 20mm spacers?

I've got 15mm spacers on all wheels (front&rear). It looks like this is about max for the car. Already I see that because the wheels are more outside the car, the paintwork suffers because of chipping in the arches...
 
Here´s 20mm rear and 12mm front.

pic

I wouldnt like to use that wide spacers in front but i need to because there is not enough clearance with those CH´s and my Porsche calipers.
 
No there is no scrubbing even at track on heavy cornering. In front I think that 10mm is enough because then wheel is same level than car body. Now i got my wheel few mm´s over...
My wheels are 8.5" wide ET35.
 
Triple_A said:
Here´s 20mm rear and 12mm front.

pic

I wouldnt like to use that wide spacers in front but i need to because there is not enough clearance with those CH´s and my Porsche calipers.

That is one clean and sweet looking car Triple_A. Which silver is that?