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Old 03-08-2004, 01:08 PM
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Question How long can I leave primer on before painting?

I am going to use epoxy primer on my truck, but would like to know how long I can leave it on until I paint. I will probably be about a month after priming before I can paint it. What is the best way to scuff it before painting a Scrotch Brite pad or sand paper?


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Old 03-08-2004, 02:33 PM
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If you are using a quality epoxy primer you will have no problems waiting a month or so before painting. I would choose sandpaper rather than scotch brite to prep the primer for paint as the sand paper will do a better job of leveling the primer for you.
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Old 03-08-2004, 04:38 PM
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Some epoxy primers are non-sanding, not to say that you cannot sand them, but that they do not sand well. You should be able to wait indefinately, for the most part. If your primer is of the non sanding variety, just spray a couple coats of primer/surfacer on over it after the recommended flash time. I prefer to use House of Kolor KP2CF epoxy primer, because I believe it's a great product as well as being a high build, sandable product. For the most part, I metalfinish everything anymore (no body filler) so three coats works out great and seldom ever sand through. I like to wait a minimum of a week before block sanding, and a month or more will be even better. This allows the solvents to escape.
I would also suggest wet sanding with 600 grit wet before applying paint.
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Old 03-09-2004, 06:06 PM
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If you are using a top notch product you can wait a very long time.I was doing restorations where the body gets dipped,cleaned and sanded and then self-etching primer laid down and then epoxy primer.Sometimes you can't get to doing the bodywork on cars for a while(It is a Full restoration)and never had a problem with waiting sometimes a year or so.
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Old 03-10-2004, 07:12 AM
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I also use house of color epoxy, it is a good hi build, follow instructions, put at least 2 coats on, apply guild coat, and bock sand, any bare metal recoat, its very easy to sand, its water proof, when you get ready to paint scuff with 600 wet or dry, spray your sealer, do not sand, apply base coat, then clear coat , shine will really come on with 2nd coat I use 3-4 clear coats, color sand and buff if needed ,most important part follow directions, time between coats are critical, , house of color is a fine brand , get 1 of there tech books they are free, they also have a hot line you can call and talk to a tech before you start.good luck . doc
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