Best chassis paint for rusty frame

jeepguy1948 said:
Rustoleum tech support told me that their “Clean Metal Primer” is what original Rustoleum was.
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769 Damp Proof Primer, Rust Oleum. I have been told that this is a good starting point.

Will penetrate the loose surface rust down to the bare metal and hopefully stop any continuation of rust. Will not last forever, but what does.

I don’t believe winter driving is a big problem with a Model A today. It’s more likely stone chips and moisture building up in the frame seams.

That is the main reason I went with the rubberized undercoating. No stone chips or visible signs of rust after many years. However, undercoating isn’t right for everyone.

Good luck.
 
On every old Ford that I've removed undercoating from, the corrosion was advanced. The coating deteriorates over time and gets cracks or fissures that allow the moisture in when running in a wet environment. The moisture stays in there since it can't dry out very fast. The mixture stews and can really do some damage. I have two 1951 Mercury cars that both came out of the St. Louis plant and both were western cars. Kansas and New Mexico don't use as much salt as some. The New Mexico car with no undercoat had very little rust in the sub structures but the Kansas car with undercoat did. I had to get new inner and outer rockers for it. If it hadn't had so much sentimental value to me and my family, I would have parted it out.

Folks that use it should at least prep and prime the metal well prior to application and then they need to stay out of corrosive environments as much as possible and rinse a car with fresh water after getting in road water or any winter salt.
 
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Benj, Moore/ Coronado "RustScat" Recommended to me by a painter. Another is Magnet Paints" " Chassis saver ". People who've used both Chassis saver and POR 15 say they're pretty close to being the same thing. Don't buy more than you need. Don't get it on your hands, It will take weeks to get it off. Very tough stuff!
Terry
 
I have had good life from NAPA Chassie Black in Satin Black. It is a very tough paint and gasoline resistant (I use it on carburetors). The cons, it is about $42.00 a quart and it is difficult to keep it from drying out in the can. Also, use gloves because the clerk at NAPA told me that the stains on my hands will have to wear off because there is no solvent known to man that will remove them!!
 
Ed in Maine said:
I have had good life from NAPA Chassie Black in Satin Black. It is a very tough paint and gasoline resistant (I use it on carburetors). The cons, it is about $42.00 a quart and it is difficult to keep it from drying out in the can. Also, use gloves because the clerk at NAPA told me that the stains on my hands will have to wear off because there is no solvent known to man that will remove them!!
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Ed, Int sounds as though Magnet Paints, Chassis Saver, POR 15, and the NAPA product are all about the same. And BTW, The last time I bought Chassis Saver it was $42 a Qt. There's always Coronado/Benj Moore, Rust Scat that I bought for $18 a Qt. I forgot to mention that most of these products require a top coat of black or the UV from the sun will turn it gray. All these rust preventatives should be bought by the quart to prevent the excess from drying out. If you're brushing it on pour off a little in an old can and close the can, tight! This stuff dries quickly And again, don't get it on your hands!
Terry
 
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