Bare metal primer

Hi
Hope everyones having a good weekend. Forgive me but i have no experience in paint and body but im looking for some guidance in my mopar build. Looking for suggestions on covering bare metal which type of primer and what to prep it with. Also ive been using a wire wheel on the inside of my car and planning on painting the whole inside with por15. Please let me know if this is the route you took to preserve the inside of your car.
Thanks
Max

Max, go over to exterior thread this question will be answered there. Lots of input from start to finish. Good luck with your project.

Zinc Oxide primer for bare metal then your epoxy/build coats over that.

Max, below is from a post several years ago in a MG forum. May be of some help. Personally I grind to bare metal and use epoxy. If I can't get to bare metal I use Rust-Oleum Rust Reformer on body panels (inside or out). When working on a frame I use POR-15. Best of luck.

Regarding POR15: I painted areas of the cockpit and on second thought was concerned that the uphostery glues would not stick. I wrote PO15 directly and here's their answer.

"I would use a product called Tie Coat Primer to prime the Por-15 paint you have already applied. It is very important that you either prime or sand the surface of the paint. If you do not sand or prime it is very likely that the upholstery glue will not adhere properly. I would use the primer because it is designed to prime and etch the surface of the paint and not compromise the integrity of its adhesion."

The bottom line is that if you don't either scuff it or use the Tie coat etching primer, any top coat won't stay on. It's a polyurethane paint and things don't like to stick to it unless mechanically abraided and the lower paint layer has some teeth for new paint to stick on and hold. 80 or 100 grit and red scour pad. Tie coat primer etching breaks the topmost layers chemically so that the rest of tie primer paint and subsequent topcoats will stick.

PO15 by itself is used as an encapsulator of rust, but even bare metal areas without rust needs to be etched with an acid solution like their Metal Ready product when you use POR15. When metal is badly rusted, this is what provides the mechanical teeth for POR15 to stick on. I've used this stuff on wire brushed rusted metal, washed with their degreaser, Marine Clean, followed by the Metal ready which etches and then turns rusted areas to a zinc coating. Following their directions and things work well. You don't and you'll be doing the job over sooner than you planned.

PS Nothing cleaned the varnish in the bottom of the oil pan better than the Marine Clean. I suppose Easy off would have worked too. The Marine clean has a high pH and worked well like Easy Off does on baked grease.

For the exterior I went with DP90. It's not cheap, but well worth it. I found the whole kit (with catalyst) for about $275.

Great info thanks the input.

Yes, epoxy primer goes on bare metal if you can use automotive repair systems.