Questions about primers, prep and such, for parts

[71CHEVYSHORTBED402]

Not for body work, but brackets, horns etc.

Self-etching primer: I'm a bit confused when to use self-etching primer. I read where you sand first and then use the primer. I also read you only use self-etching primer on bare metal when you have not sanded.

Red scotch-bright pad: If down to metal, seems a red pad is a nice final surface prep. prior to cleaning, do you agree? If this is done, can I use a self-etching primer or self-etching chemical?

Self-etching Vs epoxy primer: perhaps I misunderstood, but I read where you use both in primers in some instances. I also read you use one or the other, not both.

Self-etching primer Vs self-etching chemical with epoxy: If either self-etching primer or epoxy primer................is it a basic rule of thumb that:

1. Do not use a self-etching chemical with self-etching primer.

2. Do use a self-etching chemical when using epoxy primer on bare metal.


Wax & grease remover: Is it a good idea to use wax & grease remover with either primer? How about wax & grease remover followed by a self-etching chemical?


Thank you.