Stewart EkoPrime - Begin Commercial...
I've used quite a few different types of primer in my build, but my favorite by far is Ekoprime by Stewart. Sure, it's not as tough as a 2 part epoxy primer, but to be honest, I just don't see why most interior parts need bullet proof primer. And just because it's
less durable or maybe has slightly less corrosion resistance than something else (like the toxic 2 part AKZO) doesn't mean it's not a great product. Some folks seem to get really caught up in finding the very best of X out there, not realizing that for the job at hand, the qualities of X may not actually matter in a practical sense. For my money and convenience factor, Ekoprime has been a hands down winner for the interior. After it cures, it takes a pretty significant amount of abuse to damage it. I usually scuff with scotchbrite, wipe down with acetone, then shoot primer. After testing a number of different approaches, I no longer do acid etch or super involved prep work.
https://vansairforce.net/community/showthread.php?t=199937
If I do scrape the primer off when I'm working on something, I just grab a small jar of it that I have sitting on the bench (have had the same small glass jar of it for over a year), stir it, and dab it on the scrape with a Q-tip. You can't do that with a 2 part primer that has a pot life.
For the cockpit area I did switch to Ekopoxy (2 part, but still waterborne) just for the high wear areas. The Ekoprime is so much more convenient, that I think if I were to do it again, I'd just use Ekoprime for this area too. One thing to note - the smoke grey color is very hard to see coverage of when spraying. I prefer the charcoal grey for that reason.