Quote:
Originally Posted by Rick D
Mike those are just the TDS sheets for the products. What I'm talking about is the process of how you go about repairing or doing a complete paint job on a Matte cleared car from one of the OE company's to repair or repaint. This process would be the same if you were redoing a MB or doing a custome car.
I have not tested PPG's matte clear but I have a couple of friends that are tech reps for them and we have had talks about this. They have the same recommendation as most of the paint company's.
In most cases we (the paint company's) have just adapted what the OE's have put out as to how repair their Matte paint on their cars.
Yes I agree that I would hope your rep would not tell you something that is not on the TDS sheet, but this would come from their repair proses sheet not the product data sheet. 
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The global sheet does not mention it, but the sheet for 2060 mentions it can be applied directly over basecoat. A concern I would have if you are trying to achieve a dead flat result, would be the fresh gloss undercoat gassing out and raising the gloss level of the matte top coat as it cures. The matte is very finicky in application and mixing to achieve even levels of finish over large surfaces. I have shot the outside of one car matte. It was over gloss that had already cured over one year, and it was a two-tone gloss/matte finish, but have shot plenty of engine compartments and interiors straight over basecoat with excellent results. It also helps to use appropriate cleaners for matte finishes as well. I really like wizards matte detailer to keep surfaces clean.