base coat directly over epoxy

Might be too late (or a new part,) but I painted my 2017 street glide last winter and just wet sanded the factory clear with 400, then epoxy sealer, base and clear. Came out great.
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Someone woke this thread up from 9 years ago, and the user who asked the question no longer has an active account.
 
e086011 said:
your fine with 320 and Basecoat/Clearcoat right over the epoxy, a sealer is optional but not a must
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Just for the record, in my system (Standox) we could never get away with spraying a metallic base over 320, so the minimum grit I would recommend is 600. The TDS for the solvent basecoat calls out P800-1000, but we only do that on blend panels, where the lower coverage metallic can easily map sand scratches.
 
crashtech said:
Just for the record, in my system (Standox) we could never get away with spraying a metallic base over 320, so the minimum grit I would recommend is 600. The TDS for the solvent basecoat calls out P800-1000, but we only do that on blend panels, where the lower coverage metallic can easily map sand scratches.
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Saw that too and wondered what base he is using. I've never used a metallic that could get away with 320 either DA orby hand. 600 wet is what I found the min is as well shooting metallic over sealer. 800 wet if you are not sealing.
 
@Chris_Hamilton, with Standox solvent we can sand with 600 if at least 3 coats of metallic are to be applied. On new parts that already have some coverage due to being jambed, we sand with 800 paper, 800-1000 sponges, and/or gray pads, since they will likely see only 2 coats plus maybe a mist/droplet coat depending.
 
I guess I've been lucky, but on new parts I have been da sanding with 320 followed with a maroon scotchbrite, sealing and painting, with many different sealers and bases, for 30+ years and never once do I remember having an issue with scratches showing. No sealer, always 600 wet followed with gray scotchbrite. 800-1000 with gray scotchbrite on blend areas.
 
Lot of what I said is based on using DBC in years past. DBC and Omni + (hated it but had to use it at one shop) did not like anything coarser than 600 even with sealer. Maybe some of it was the urethane sealer I was using or how I sprayed it (thin) but I had issues withit when applying it after sealing over 400 wet and 320 DA. Polyester basecoats seem to be more forgiving.
 
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