dodge68charger
Well-Known Member
I Had My Frame Sandblasted and A Local Body Shop Put It Into Epoxy Primer A Few Days Ago. Just Wondering How I Go about Prepping The Primer For a Top Coat Of Black Paint. Thank You
Prepping Epoxy Primer For Paint??
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vintage chromoly
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Generally, you have a 7 day window to cover epoxy with no additional prep.
After 7 days you have to sand it before you put anything over it.
After 7 days you have to sand it before you put anything over it.
You will need to find out what brand your shop sprayed and get the sheet on that product. I'm using PPG epoxy right now on my current project. With that, there is a 72 hour window where paint can be applied over it without scuffing. I also have some Southern Polyurethane epoxy which has a 7 day window.
If you have to scuff it, make sure you do a good job and get all the gloss off. Otherwise you may have adhesion issues.
If you have to scuff it, make sure you do a good job and get all the gloss off. Otherwise you may have adhesion issues.
Mike67
Well-Known Member
I think I used the Autobahn 1:1 epoxy on mine, IIRC it was a 48hr window. Otherwise you need to scuff it with a scotch brite pad and tack off before shooting anything else.
You don't need to "sand" it. As previously mentioned at least a couple times, it only needs to be scuffed to remove the gloss. And fortunately scotchbrite pads are much more flexible than sandpaper - to get into all the nooks and crannies on the underside of a car.
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depends on the brand........ some sand easily, ie SPI epoxy and U Tech E380......... others sand like a rock and clog the paper
747mopar
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Everybody pretty well covered the bases, I do prefer to topcoat asap rather than later though for a better bond. As mentioned scotchbrite pads are far easier to prep with, I use the more coarse one.. typically Red in color.
ckessel
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Play it safe and hit it with the Scotchbrite. Better than having to re-do it.
Mike67
Well-Known Member
The primer is not perfectly flat and does have a glaze after its flash time. The scotchbrite will knock down any "bumps" or roughness and give a little "tooth: for the next coat. You will feel the difference in before and after.
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