Quote:
Originally Posted by GregWeld
#1 rule ---- NEVER scuff anything before it's been cleaned and decreased. The reason for that is because if you scuff first - you push the grease and dirt and wax etc into the scuff groves (for lack of a better description).
Simple Green is good for a first couple rounds of cleaning....
Then I use PPG DX 330 - which is a wax and degreaser... When it's SQUEAKY clean (yeah you can actually get it to squeak)... then you scuff.
Make sure you test a spot with your paint of choice -- you'd be surprised at some of the bad reactions you can get. No point in finding that out after you've shot the whole area.
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Really good advice. I painted my tail light panel in matte black (finally used SEM trim black as Charlie suggested), and tested 7 different matte/ satin/ semi-gloss brands to get the sheen I thought was right. After sanding & scuffing for hours, the paint curdled (for lack of a better term) in a couple areas. I re-sanded those areas, cleaned with adhesive remover, followed by IPA, and re-shot. Curdled AGAIN, but in smaller areas. Went through this 4-5 times. Finally tried another primer (was using Krylon), and that worked. There was an incompatibility between the Krylon & the SEM.
Wish I had tried it on a piece w/o all the details that I had to sand time after time.
This was the sheen the SEM provided...
