The cab went off to the dipping shop today. Should be back in 2 to 3 weeks. ( 1960 C20 ) So, after hearing and reading tons of opinions I would like some advice on what I should do with the cab when it comes back. Do I shoot it with primer or sand it or?????
I have heard of horror stories about rust resurfacing years after dipping, etc.... I was considering priming all the areas that will not be replaced with new metal. Do I need to sand it first or ????? advice needed
Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums
I guess it depends on what they dip it in. I'm assuming it wasn't sheep dip, but paint remover and/or maybe rust converter.
I have not heard of dipping, but if it's just to remove the paint, I would assume you need to primer it. Don't know about sanding. If they use ospho (phosphoric acid) in the dip, you need to be aware of that, as it's not compatible with epoxy primer.
I'm sure someone will weigh in with more info, but you should quiz the guys who're doing the dipping to find out what they recommend.
Kevin First car '29 Ford Special Coupe #2 - '29 Ford pickup restored from the ground up. Newest Project - 51 Chevy 3100 work truck. Photos [flickr.com] Busting rust since the mid-60's
Not knowing what was used, I'd guess you need to find some acrylic lacquer primer. You can almost prime a rusty bucket successfully with that stuff, and once it has been applied, you can over coat it with epoxy primer if needed. Advantage is a good brand. Mix it 1:1 with a decent grade lacquer thinner and coat everything you can. I've heard those same horror stories, and most of them come from people living in humid areas or areas where it tends to rain a lot. But you hear a lot of things. Good luck.
Ready-Strip dipping facilities used to be all over the U.S. but the EPA has nearly killed them. Used to have blocks dipped and they came back as virgin grey cast iron, not a speck of rust or scale in the water jacket. I believe they use methylene chloride solution in the dip tanks.
The cab came back and it is really rust and paint free. They would only say they use a 4 step process and one step is a mild acid (top secret) formula. If it was not solid metal it is gone now. I could not believe all the pitting and rust through. Bottom line is I am happy with having the cab dipped so I did the rear fenders and hood as well. I will now have major patch panels to weld in as time allows. I will send more pieces over for acid dipping as time and budget allow.
The down side is there is no paint left in the crevices and hard to reach areas. Since every area really had rust I will just have to do my best when I shoot primer. There was no point in painting over rust so I am happy with the results so far.
Sand blasting: I had the frame and all the underside metal parts sand blasted. I stripped off every bolt and dismantled the rear end and front suspension / chassis parts. The sand blasting was great and now I can paint every piece front and back before putting it back together. There was so much unseen rust between the metal pieces I am really glad I tore this Apache completely down. I do understand why most people would not do this but 20 plus years of sitting in a swampy area led to this truck having severe rust problems. I just could not leave all the unseen rust under new paint. Going to be a very long process putting this C20 back together. The frame is off to get powder coated. Not sure I would do this again but powder coating looks good and will really seal the frame up.