Method for Painting Sliders

I'm trying to figure out how I'm going to rattle can my new, bare metal sliders. Planning on cleaning with acetone and a scotch brite pad, then self etching primer, and then bed liner. Where I'm confused is how to stand them up, or lay them down, when applying the primer and paint. Any tips? Thanks!

 

Have them sprayed with bed liner, had my step bars done almost 3 years ago and no chips, dings or rust and I run a fair amount of gravel roads.

 

Lay them across something elevated and paint one side. Let it dry and then flip them over and paint the other side. I used saw horses but anything will work.

 

I used jack stands to keep them elevated

 

Are you welding them on?

 

Saw horses for painting