alrighty, I'll chime in with my .02 and see who I can offend....
first, as for a catalyzed process, "epoxy" primer is a little dinosauric.. honestly, it's older tech and the urethanes out now are superior.. it was "the chit" 10, 15, 20 yrs ago, not so much anymore.. the urethanes are a superior product, stick just as well, just as waterproof, and WAY more user-friendly...
i'm just as guilty for propagating the term "epoxy"... I say it all the time, just because I think it's a term most will recognize, and it's in the same ballpark as a modern urethane primer...
now, that being said, epoxy primers are definitely a superior product to ANY of these other choices, RB, POR, etc.... any catalyzed product will blow away a non.. period.. end of story..
sorry guys, encapsilators such as RB and POR have their place and uses, but will never hold a candle to a proper catalyzed system... Thats why I always say, that I hate seeing someone go thru the bs of blasting a frame, think they're doing it as best as they can, then put an encapsilator on.. don't be part of the hype bandwagon...
I mean, it's not bad, better than rattlecans, lacquer primer, etc, but encapsilators don't hold a candle to a 2-part zinc wash, urethane primer and topcoat... which obviously is more costly, but if we're talking quality, it's the "right" way to do it......
if you got a rusty frame, aren't blasting, or it isn't critical to you, RB or POR away....
also, let it be known, that bedliners such as Herc, etc will also hold up WAY better over a proper system such as I mentioned... my interior will be zinced, urethaned, Imroned, THEN Herced... far superior to putting a bedliner over primer, or god forbid, raw steel...
95% of the world wont do that... they may put a nice primer on, and sand it, then say, screw the topcoat, I'm just gonna herc it, "nobodies gonna see it"... that may be true, but if you want it as bulletproof as possible, that Imron or good paint topcoat makes it that much more durable...
I diatribe about this stuff because I want you guys to know the right, best way it can be done.. you backtrack that as you see fit depending on your budget, or hopefully not laziness...