Which Primer? Or What Next?

CUUDAK said
I AGREE!!

Use the 270 first! This will allow you to fill small imperfections. 2 good coats and let it dry. If you have deep sand scratches block with 220 dry then apply 2 more coats and block with 600-800 wet. THEN you can apply the Epoxy sealer. I use DP90LF(pricey stuff), this also can be used as a primer depending on how it is mixed but I wouldn't suggest it. Mix as the sealer direction on the can and spray away. Caution!! It does have a window to topcoat. 20 days to topcoat!! This stuff will harden and you can't chip it with a hammer!!! Good thing is after a couple of days just scuff it with a fine scotch bright and apply your color!
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I also agree. 270 is great primer. It doesn't call for reduction but if you want a good idea is to reduce the first coat. This will allow it to soak into the filler and sand scratches. I usually pound on two more coats after that. It actually builds very well. I have always used DPLF for sealer and it works great. For a resto I have always primed over 80-180, then block/board sand with 180, then re prime and board/block with 400ish.