What is the purpose of self etching primer?

Self Etching Primer

Epoxy Primer vs Self Etch Primer for Bare Metal

How to use automotive primers, epoxy, etching, and high build basics explained

How to Choose The Right Primer & When To Use Each Type of Paint - Kevin Tetz at Eastwood

Understanding Primers: Epoxy, Polyesters, and Urethanes explained.

Self-Etching Primers - Types & Applications - Weld Thru & High Build from Eastwood

EPOXY vs ETCH PRIMER - WHICH ONE DO YOU NEED ??

Do you have to prime over self etching primer?

Advice when on spraying etch primer

What is the difference between self-etching primer and regular primer?

Do you need to sand self etching primer?

Self-Etching Primer - Etches & Primes Bare, Rust-Free Metal All-In-One Step - Eastwood!

RAPTOR Acid Etch Primer

How To Primer Your Engine Before Paint - ETCH PRIMER - Make Your Paint Stick

Bare Metal? Which is best? DTM, Epoxy, Urethane, self etch primer, sealer?

Primers Explained How to Choose a Primer

How to Apply Adhesion Promoter for Plastic, Self Etch Primer, and Other Types of Auto Primer

How to Use Rust-Oleum Automotive Self-Etching Primer & Primer Sealer

What is Photoetch Primer?