rust treatment for bare metal?

[jhelgesen]

What does anyone have for suggestions on treating these edges? I've got the rust leveled and out, but the metal is discolored. Should I POR them, wire brush, sand down to nothing? I'd like to spray epoxy on them soon to keep the rest sealed.

[esty]

wash it with phosphoric acid...available under various name brands at home depot lowes, etc...then epoxy primer

[nbcbird]

It looks like the rust was converted with a rust treatment. I would get as much pittiing out as possible and prime with an DP series epoxy primer (a filler might be necessary). Someone with more rust experience might have another opinion. Under NO circumstance would I ever use POR 15 under a body finish. Good luck.

[scoyote]

Esty has it right---rust converter must have Phosphoric acid to make the chemical conversion---make sure it is an active ingredient. Anything else is either a cover up or it's snake oil---scoyote

[jhelgesen]

I've been treating with POR's metal ready, I'll keep treating. Then I have dp40 to spray.

[Guest]

Media blasting would be the best to remove rust in pits. Hydrochloric (muriatic, swimming pool) acid will remove the rust also; do not breath the fumes, wear gloves. Then treat with a phosphating solution. Better than phosphoric acid is something like Prep Step.

[TobyB]

If that was mine, I'd hit it with the

3M stripping wheels- they'll pull most of the

corrosion out without taking much metal.

Then I still like etch primer- it's phosphoric acid based-

then dp after that. Then some filler.

Then a lot of sanding.

Then more dp, and primer- surfacer.

Then some more sanding.

Then more p-s and sanding if needed.

Then finish sanding and color...

t

[Arshloch]

I remember seeing an image in a hotrod dedicated magazine, that showed a fender off a 30's sedan with its paint stripped and the rust that was "killed" by somebody in the 40's or 50's along with some led repairs.

I guess removing with phosphoric acids or converting it is a good option.

[allbim]

Use a small stainless wire brush, available at Harbor Freight and all welding supply stores and a phosphoric acid based rust remover, available from Eastwood. It works.

It's a good rule to apply primer no longer than 2 hours after sanding. Any visible trace of rust is not good.

W. B.

http://www.eastwoodco.com/shopping/product/detailmain.jsp?itemID=16671&itemType=PRODUCT&iMainCat=379&iSubCat=380&iProductID=16671

[jhelgesen]

Did more sanding with 220, then wire brush, then metal ready. Finished up with DP40 primer.

[allbim]

The primer looks fantastic. You are taking care of those little dents and bumps aren't you? They were probably not visible before priming.

W. B.

[jhelgesen]

Yes, the bumps and dents stick out like sore thumbs now, I could feel some of them before primer, but not all.