Serf27 wrote: So DTM primer is basically a high build primer & etch primer in one?
Sounds like it might be good for me to have a black epoxy on the shelf and a light grey or white one too.

DTM doesn't have (acid) etch primer built in, but it isn't needed with this type of primer. It is more like a hybrid epoxy/urethane, depending on the brand/type.
I use this for almost everything:
https://www.autobody101.com/store/paint ... rimer-kit/
I have a sandrail that has been sitting outdoors in this primer for about a year with no signs of failure (rust killer DTM):
https://www.autobody101.com/store/paint ... -full-kit/

They also make epoxy primers.

So quick repaints would be best to spray them with DTM primer?

That is what I do. It will cover sand-throughs to bare metal and just about any other type of material you will run into in the autobody world.

Thanks for that Bobby. So I'm goig to be investing in some DTM primer and some sealer for uniform color at the start. Thanks everyone!

What is the fastest drying primer aside from laquer primer?
I'm talking about spraying it on, letting it sit for a bit then giving it a sand and spraying some paint on it.
I was going to order laquer tomorrow but if theres something besides that, I will go for option B.
I usually have no time to spray some other primer and wait till the next day for it to dry so I can sand it.
Thanks.