As I crawl over, through and under the ’73, I keep adding to the list of things I need to address. While laying under it I’ve noticed surface corrosion inside the frame rails. Completely understandable as the car was a daily driver in NJ for the first 25 years of its life but want to clean it up. My plan is to hit what I can with wire brush and use one from the list below, and looking for folks experiences... or other alternatives. Is there a latest and greatest? I am leaning towards the Eastwood coating (not the least which is because it is spray-able) and would rather stay away from Por15 – simply for the pain it is to work with. But, if it is still the way to go, it is what it is. Eastwood Internal Frame Coating Aerosol Black https://www.eastwood.com/internal-frame-coating-aerosol-black-14oz.html Rust-Oleum Primer Sealer https://www.rustoleum.com/product-catalog/consumer-brands/auto/primers/primer-sealer Rust-Oleum Rusty Metal Primer https://www.rustoleum.com/product-catalog/consumer-brands/auto/primers/rusty-metal-primer Por 15 https://por15.com/collections/rust-prevention Thanks!
i used this stuff called Bullet from Summit racing there was a two step paint process, a primer that looks like silver and the black that goes over that. I used this on bottom of deck on my JD mower and it held up pretty good to the grass and crap sticking to it and pressure washing it. A qt is about 25-30 bucks but seem to work good.
I completed a project like this awhile back and stand behind Eastwood. Wire wheels (safely), wire brush and masks. Pretty dirty but results are pretty good short of frame off. Full on cleaning, scrapping etc. Use heat gun to remove old undercoating as needed. Use the rust converter (dries hard and is difficult to scrap off), let it dry, then rust encapsulator frame paint, Done. another final finish is the Raptor bed Liner system. Lays down pretty smooth for bed liner and the finish product is nice and protected. I painted frame using the Eastwood and used the bed liner on the body. Gary
I used MasterCoat, a moisture-cured urethane, plus the black top coat https://nomorerust.com/store/rust-stop-paints/8-mastercoat-pemanent-rust-sealer.html Un-equalled moisture and corrosion resistance
Rust bullet was the stuff worked good The one posted says concrete on the can but it is that brand. Only acetone would clean it.
Very interesting. I like that it comes pre-mixed to spray. I am not all that well versed with spray guns, but do have a small sprayer I used to use for over-spray on undercarriages, red oxide on Ford pumpkins, and such. I need to get back under and see just what kind access I have to the insides of the frame. Thanks all!
My experience with por-15 not good however i believe it's related to intended use. I did not use on a classic car that barley sees rain. I have a 2003 sierra, bought new, never liked frame wax but from MI weather is slowly disappeared. I completely clean the frame (still some surface rust no issue as this is what's its for). touched up here and there over 10yrs. finally some started falling off in sheets. Upon closer review i see the sheets are infused with steel frame rust. Por-15 trapped so much moisture it rusted underneath the coating and has caused more frame damaged then it left bare. No doubt it should work well for cars that don't see snow, SALT, rain, dirt etc.
I also used the Eastwood rust encapsulator and this stuff worked decent, it is still on the car and has not come off. Safer than the por-15 but will all paints now especially if spraying with a can in a closed area like garage I would use a respirator.
I have always used por-15. Good results. Have been using it on the underside of commercial mowing decks for my nephews lawn business for a few years . About the worst environment for moisture etc. we power wash them weekly. 3500-4000 psi and it holds up well I have done several frames and underside of vehicles. Sprays well. Local suppliers are pushing zero rust snd chassis saver but I’ll stick with por 15
Have you thought about using products like Krown or Fluid Film, esp since it is inside the frame rails?
I have only used POR 15. I can not imagine anything better for protection. That said it does not like oil and dirt, so clean the surface well. . If you can find the small cans get use those, it cures with moisture and a little humid can make it clump in the can. I clean an area where I'm sure I will use several cans so I don't have to store an open can. Additionally its thin like water and can be messy. Sun light (UV) can alter its color so spray a top coat on it. I use it on farm equipment and the underside of 2 of my old cars. I love it
I have also used Eastwood’s internal frame coating to do the inside of a boxed convertible frame. I thought the small diameter spray wands they include were a joke but actually work pretty well. Instructions say to use 2 cans for std car frame. I used 4. It was only avail in epoxy green when I used it. Now I think it’s avail in blk. It’s pretty thin but I did several coats to inside of frame after having it dipped . Sprayed exterior w por 15.
I was told by a POR rep that POR "keeps "if poured into a sealed jar (Ball/Mason jar) and refrigerated.
