RM Primers
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DP20
Their economical primer, its not the best primer but I got by with it for quite a while. It sands very tough, but holds out very well. The major downside to this primer is it isn’t allowed to sit for longer than 12hrs before being painted. I’d recommend this only for spot repairs.
DP21
The primer that you mix with diamont basecoat, it’s a great way to use up left over paint from previous jobs. It sands alright but dries slow & smells potent.
DP25-26-27 Powerfill
One of the nicest primers I’ve ever used, sands excellent & fills good too. A nice thing also is that you can use this as a wet on wet sealer. Also a direct to metal primer.
VP126 UV Primer
The best primer offered in this line, the only downside is you need to invest in a UV light, or do all your work in the sun. This primer fills good, sands amazing & is fully cured in about 5 minutes. Highly recommended.
DP200 low voc
Its pretty well a worse version of DP20, it sands terrible. Apparently you can use it as a wet-on-wet sealer aswell, however I was so disgusted with it as a primer I never made it that far.
DP226 low voc
Finally low voc primers are coming around, pretty well the same as the powerfill primers except: it doesn’t sand quite as nice, but still nice. It can sit on the mixer 24hrs a day but still when you get near the bottom its so thick you end up just throwing it out. Its also direct to metal which is nice.
Epoxy primers with Polyuroxy Additive
Its nice to know your getting the best corrosion protection, but it costs you. It sands alright but it clogs your paper frequently. It works very well as a sealer though. It dries slow as a primer or sealer also.
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