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Newbie With A Question On Primer Over Factory BC/CC With Burn Through

mjd

New Member
#1
I was prepping my car for paint. I burned through the factory clear in numerous spots getting out imperfections. Through the clear and several spots through the basecoat. In doing some research I came up with this plan. Just wanted to run it by the pro's to see if I am on the right track. I was going to prime the entire car with Southern Polyurethanes epoxy and let it sit a day. I was then going to prime with a SP 2K. Let it sit a day or so. Then throw on a guide coat and block with 600 grit. If I do not burn through, lay the SP base/clear over the 2K. Does that sound about right? It is on an 07 Vette if that matters? Thanks!
 

texasking

Active Member
#2
You may not even need the 2K. 2 or 3 coats of epoxy, wait a day or two, block with 180 to 220. If everything looks good, just refine your scratches down to 400-600, depending on color. Guide coat works well during these steps. Then just use epoxy as a sealer before base.
 

mjd

New Member
#3
Thank you for the information and recommendation! I have a stupid question. While looking at the Tech sheet for the epoxy it mentions reduce by up to 50% to use as a sealer. So does this mean that I mix the primer and activator, lets say that is 32 ounces. Then I add up to 16 ounces of reducer (for the proper temp range)?
 

texasking

Active Member
#4
50% would be 1:1:1. I usually just reduce 25%. 1:1:.5. Just depends what you are trying to cover scratch wise and color wise. 50% is pretty thin and transparent, but works great for base adhesion. Also the thinner it is the faster it flashes. Solid colors are more forgiving, surface grit scratch wise, while some light metallics like silver can be very particular. Usually 400 before sealer on solids, 600 on metallics. The only stupid question is one not asked.
 
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mjd

New Member
#5
Excellent! Makes sense to me. Spraying it SP black. Do you usually sand that 400 for solids, 600 metallics wet or dry? Thank you!
 

texasking

Active Member
#6
I usually dry sand up until the last step, then wet sand with 400-600 and wash everything real good with Dawn soap and a grey scotchbrite. In your case, 2-3 coats epoxy, mixed 1:1, wait 24-48 hours (OR LONGER), block dry with 180-220, guide coat, 320 dry, guide coat, finish with 400-600 wet. If during the first or second step you sand through, find an imperfection (chip, scratch,etc.) that won't block out, stop and repair with polyester putty, spray one coat epoxy over that area and continue with your steps the next day. Are you using black epoxy? If so, they make a white powdered guide coat that works well.
 
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