SPI Universal Clear Over SPI Epoxy Primer

9

9t9-5.2

I primed my front fenders and radiator support with the SPI white epoxy, the fenders will receive some additional work before bc/cc, the rad support was going to be painted black, after priming I am tempted to leave it white. Surprisingly the epoxy very closely matches my Dakotas white finish, Can I clear over the epoxy? likely spraying again with a reduced (sealer) coat.
My inner fenders were white originally, I am thinking about scuffing, priming, and clearing them also.

Thanks,
 
For the radiator support and inside the engine compartment that will work just fine as long as the white matches.
You can clear over the epoxy anytime up to seven days without sanding.

A foot not back in 99 or 2000 I did the radiator, brake booster, engine mounts and other odds and ends on my 57 T-Bird with the black epoxy and universal clear, still looks great
BUT this should be done in areas where UVs are not an issue.
 
Barryk;17289 said:
For the radiator support and inside the engine compartment that will work just fine as long as the white matches.
You can clear over the epoxy anytime up to seven days without sanding.

A foot not back in 99 or 2000 I did the radiator, brake booster, engine mounts and other odds and ends on my 57 T-Bird with the black epoxy and universal clear, still looks great
BUT this should be done in areas where UVs are not an issue.
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Great!
Thanks, it will be under hood only. The white is very close to my Dodge white and I think it will look good all white under hood.
 
One thing to remember is as your epoxy part B ages it will turn color and change the color of the epoxy-won't show with black epoxy but with white or grey it can be a problem if you're looking for a consistent match.
 
Bob Hollinshead;17312 said:
One thing to remember is as your epoxy part B ages it will turn color and change the color of the epoxy-won't show with black epoxy but with white or grey it can be a problem if you're looking for a consistent match.
Click to expand...

If that is a legitimate long term reaction, I better paint it. I am not concerned about a slight color variation but not interested if it will discolor.
 
No, the color won't change after it's on the car. It's the epoxy activator part B that darkens as it ages in the can that will change the darkness of the epoxy when you mix it. Once it's sprayed and cured the color is stable. I just did all the jambs of my Daughter's budget job white Impala with SPI white epoxy with Universal over it-not a problem. The part B of the epoxy will darken in the can with age, it's a light amber color when fresh but eventually turns to a brown-depending on how old the product is it can affect the color of your primer. Hope this makes sense...
 
Makes sense. I used a recent batch of part A&B that I had just received, surprising the color match is quite good.
 
If I'm not mistaken, only the black epoxy primer has the UV added. The white and the grey do not.
 
Correct, I did add some UV to the activator to help out on the white, gray and red but not real sure how much difference it would make, Key is if in engine compartment or in side of car where UVs do not hit on a regular basis, it should be good for a long time.
 
I stand corrected. That's good to know Barry. When did you start adding the UV inhibitor in the activator? I used the black for the inside of the cab and the engine compartment on my truck and thought that was the only color with the UV additive. It turned out really nice and hopefully well hold up for that long time. ;)
 
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