Body work experts?

[bigtyme1]

I know we got some top noch body builders out there and I got some question. I've been a body man for around 20 years but I been out of it for 5. when I was doing body work the deal was to weld, grind, mud then primer. From what I'm learing now I'm supposed to weld then epoxy prime and mud over top of the epoxy. I really nervous about mudding over epoxy especialy over the welded area because it's tuff to sand in all the crack and crevesouses. I hope you understand what I'm saying. what's the best way?