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Hi Lucas, Epoxy primer is, arguably, the best possibly primer for use on bare metal. The version used in the auto refinishing industry is a two part (2K) mix that has a pot life after mixing. I have used the PPG product, DP (currently DPLF for lead free), for some time and like it very much. I have not used the corresponding DuPont product. PPG’s DPLF is also isocyanate-free, which is a plus. It is, however, quite expensive at about $135 per gallon RTS (ready to spray) after mixing. I have recently purchased PPG’s OMNI line of 2K epoxy primer, MP170, at a more reasonable cost of about $48 per gallon RTS. I have not used any of that yet. Both the DPLF and the MP170 are basically non-sanding primers and also make excellent sealers over existing painted surfaces. The only sanding I have done on the DPLF is light scuffing with 320 grit prior to topcoating and I have not noticed that it is "hard to sand" as some say. You can get this type of primer anywhere automotive painting supplies are carried. Some places carry both PPG and DuPont. Others carry either one or the other. NAPA carries Martin Senour paints and I think they probably have an equivalent product. Whatever you get, make sure you ask your supplier for the manufacturer's technical data sheet for the product. That will give you all the particulars on compatible surfaces, mix ratios, application info, etc that you do not get on the can label. You HAVE to ask for this. I have never had a place offer it without asking. If they don't have it or don't know what you are talking about, take your business someplace else. Rod
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