Ok guys, Ive tried to search, but I didn't see any posts that answered all my questions. Anyways, I'm taking the Model A to get sandblasted tomorrow (inside and out) and was wondering what I can wipe on/spray on/etc. to keep the rust from starting up again until its paintin' time. Ideally, I'd like something to stop/slow surface rust but still allow me to "Metalwork" the car (if you can call what I do metalwork) and weld the necessary patches and pieces as needed. I was thinking a wipe on wash type might be good. What do you guys use and what precautions do I need to take, if any? Thanks for the wisdom.
Ospho. About $20 a gallon at your local Ace hardware store. (No one else seems to carry it.) One gallon is way more than you'll need for an entire car. You can brush it on (my preference because there is no overspray) or you can put it in a spray bottle and mist it on. It etches and protects the metal. I did two coats on the outside and one on the inside surfaces of my media-blasted '51 Chevy coupe body a few YEARS ago and there is no surface rust at all. As a plus, the Ospho "converts" any hidden rust and keeps it from spreading. Just do it outside and be sure to wear a respirator and eye protection if you're spraying it. Some brands of primer will not adhere over it - check out your primer and paint before you spray to make sure it is compatible. Other than that, you're golden.
NO OSPHO if ya don't want any problems down the road Shoot a good coat of epoxy primer over everything then do the build.
Doesn't have to be bare metal I suppose etch primer out of a can work? I have paint stuff and can use a gun if it's that much better
I have used rust oleum green self etch primer out of a can in many many many things.. Alot of it has sat outside and looked new when it came back it... And the shit is hard to blast back off I know that much!
I second using Gibbs. My truck has been in the road 3 years and even caught in the rain a few times and very little rust. You're supposed to be able to paint over without problems. I haven't done anything but small rattle can stuff. So I can't say for sure if it would be problem free. Posted using the Full Custom H.A.M.B. App!
If you don't want to go with a spray primer, WD40 works wonders. Just make sure that you thoroughly wash the panel with brake cleaner and allow it to dry before you primer and paint it.
This answer should be controversial but WD40 will work. Some of the top restoration shops use it for long term builds where they will have bare metal laying around for months or years before they get around to painting it. Supposedly, it does not create any adhesion problems later on as you can remove it with wax and grease remover. I have also used Ospho in the past with no adhesion problems later on if it was sanded well prior to painting. At $ 8 a quart it is pretty economical. I see Scotch Buzzard King types faster than me. Don
I would think wd-40 would be fine. That is what a lot of people use to run metal through pullmax, powerhammers and planishing hammers.
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