Breaking the rules with epoxy (7 day window)

MX442

MX442

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I have a project that I have been starting/stop with epoxy for nearly 3 years. I got one fresh coat of epoxy on it to resume progress. Here I am at 8 days, filler work should be done today, and it will be ready for slicksand. The temperature dropped to low 60's, with mid 50's the next few days.

So, at day 9 or 10, would it be safe to sand with 180 and apply slicksand outside the "7 day window"? I know the perfect answer is to spray more epoxy before poly primer. I need to get this project done, and I have run out of patience and time to wait a few days for warmer weather to keep applying endless layers of epoxy.
 
MX442 said:
I have a project that I have been starting/stop with epoxy for nearly 3 years. I got one fresh coat of epoxy on it to resume progress. Here I am at 8 days, filler work should be done today, and it will be ready for slicksand. The temperature dropped to low 60's, with mid 50's the next few days.

So, at day 9 or 10, would it be safe to sand with 180 and apply slicksand outside the "7 day window"? I know the perfect answer is to spray more epoxy before poly primer. I need to get this project done, and I have run out of patience and time to wait a few days for warmer weather to keep applying endless layers of epoxy.
Click to expand...
Probably? Maybe? I don't like those words in this business.
 
On an individual bases, I will change things for people I know and can trust to follow to a tee.
Since there is no epoxy like SPI, we continue to test, and with the tech line, I also learn.

Here is where we stand at this point in learning and testing.
Again, assuming the car has not
I left the building.

Sand with 180 up to 30 days for filler or 2k primer.

For two weeks, you can spray epoxy over the epoxy, without sanding.

Basecoats stick differently, and at this point, I will say 48 hours max over epoxy without sanding. And at seven days, re-epoxy.
 
There's more to come next new catalog will have these changes and more.
Been also playing with clearing basecoats from crap to best and clearing month later
And even waterborne.
 
Thanks, Barry. I know we talked about filler over 14 day old epoxy a while back. But going to slicksand I figured would be different.

I'm terrible at putting on filler. It takes me longer than a week to get it done. I fill, sand, shape, fill, sand, shape, it doesn't end. Maybe I'm trying to be too perfect with filler. I figure if I go over it with slicksand, I can get away with imperfections in the filler.

Either way, I have a lot of sand through into old epoxy and bare steel. Need to bury it with a couple more coats of epoxy anyway.
 
Barry said:
On an individual bases, I will change things for people I know and can trust to follow to a tee.
Since there is no epoxy like SPI, we continue to test, and with the tech line, I also learn.

Here is where we stand at this point in learning and testing.
Again, assuming the car has not
I left the building.

Sand with 180 up to 30 days for filler or 2k primer.

For two weeks, you can spray epoxy over the epoxy, without sanding.

Basecoats stick differently, and at this point, I will say 48 hours max over epoxy without sanding. And at seven days, re-epoxy.
Click to expand...

First post here so forgive my ignorance. Am I correct that you can spray epoxy over epoxy for up to 14 days without sanding?

I epoxied on the 5th did my filler, feathered that out and reapplied epoxy over the bare spots and filler tonight. I am going to spray slick sand but figured I would spray another coat of epoxy over the whole car, let it dry for 48, then slick sand over that.
 
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