After a very gracious man in Rocky Mtn. House, Alberta GAVE me a part I had been looking for for over 30 years (he refused any kind of payment!!!) I started looking over the project more carefully. I found two stripped fenders got some surface rust. Went over with a PA/ Eastwood surface prep tool and 60 grit. Now I hope to epxoy prime but not right away. Should I coar with Gibbs, Ospho, or vinegar? I don't want a big chore cleaning them up when it's time to paint... real world experiences....?
Get them phosphate dipped. Had some model A panels soda blasted which removes paint but not rust. They then phosphate dipped them to a nice satin gey to convert the rust.
POR-15 Metal Prep. Dissolves surface rust and leaves a zinc coating. Shake it, spray it on wet, let it work a minute and wipe dry with a paper towel. I have maintained bare metal setting for more than 10 years with this stuff. https://por15.com/products/metal-prep
Reckon that would work on the inside bottom of doors? I'm replacing door glass, and when I removed the interior panels, there were dirt dobber nests in the bottom or the doors and a lot of rust flakes. I vacuumed everything out, and the drain holes were clear, but there's surface rust in there.
heres what I do... go to home depo, get behr satin exterior paint/primer and roll it on..any color you desire... it will wash off with easy off when you are ready to paint.... I do this when I strip cars while they sit out side while I'm doing body work or they flash rust... with the behr... you can leave the parts out side for guaranteed for 25 years... learned this from the behr paint rep...
oh,... and you can do the whole car for 40 bucks... works great as a guide coat for doing metal finish body work
i used it on this truck so I could easy weld up all the holes and then just roll paint on the repairs..gonaa be years before I get to painting this truck and it's water base..
Sounds like the corrosion you have is a little more than just surface rust. To be clear, I only use their Metal Prep on clean bare metal. I don't use the coatings they offer. The Metal Prep will dissolve some of the rust and is basically a mild Phosphoric acid solution with some zinc. You could try to remove most of it mechanically with wire brushes, stripper discs/pads, scottch brite, etc. then try it. Concrete cleaner from the big box stores is a much stronger phosphoric acid and can be diluted with water to suit your needs but, it should be neutralized after with water mixed with some baking soda. The best result would be mechanical followed by media blast to remove 100% of the rust. No matter what you do you should follow up with some type of paint or coating. If you paint or put coating over any rust the corrosion will continue. Just slower. There are also rust converters out there but I have not worked with them. Maybe you can post a picture of your of what your dealing with. Sorry for the long post.
I prefer to blast/clean then use epoxy. Gibbs oil is great for keeping bare metal clean Metal prep, if recommended by the primer used, is great to remove mild surface rust.
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