To blast or not .. and then what. Professional advice sought

jaws4518

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I saw this discussion pop-up again in my inbox this week. Anyway, this reminds me of everyone's opinion of how to get rid of prickly pear cactus out here in west Texas. You hear a bunch of wise tales and untruths about how you get the job done. It's easy, rake and pile it. It's like raking underbrush. There are different ways of piling and raking to be efficient at it. It all depends of the coverage and how much you have per acre. Anyway, Cactus does not like to be piled. It rots very fast and turns to mulch. Okay, so how does this apply to the art of prepping a new surface? Well, it all depends on how good you want the result to be... The answer to the method is pretty simple. Blast and scale clean! Use the HF blasting cabinet for small parts & bolts. Cut out bad metal and mig weld new structure in its place. Forget bondo gel or other fillers for metal rot. Let your scaled and sand blasted surfaces rust naturally with some good old nitrogen rich rain. A week or so before painting, soak spray the parts and body parts down with OSPHO which will oxidize the natural rust. Use Loctite "Extend" on certain things but not every thing. Extend has "body" to the liquid, and dries like a plastic coating. Too expensive for large areas or things. OSPHO or GEM is putting on muratic acid. It's thin, and it prepares the metal for priming. They say you can use it as a primer, but I put down primer over it.

Blasting does not always work, especially on thick paint. You must scale!!!! Forget the paint removers. Those are a mess and more expensive to use than any other method. I have never seen panels warp from sand blasting. If you try to drill a hole then it will probably warp after a full tank of sand. You must scale the hard stuff. Have your bench grinder near by to keep a flat cutting edge on the end of those needles. When the edge rounds off it is time to resurface. I have never ruined anything with the needle scalier. I'm not going to use a needle scalier on something that I'm worried about being perfect. The scaling dings "if any" are a better bonding surface for primer to begin with. More on paint next....
 

Karl kostman

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If I were in your shoes and you dont want this truck to be the new most beautiful Deuce in the country is replace the doors, I would talk to Deuceman51 on this site. I would pull the fenders off the truck and get them fixed, dents, rust etc if you can do this yourself all the better. I would get all the body work done on the truck that you feel is needed then I would pressure wash everything off very good and run over the truck with a good Dual action sander (DA) there is no need to remove the paint because it makes an extremely good base to put your new paint onto and removing all that paint is going to be a needless pain in the butt! If the bed needs work I would pull the bed off the truck then attend to the frame touch up and work on the bed I would then paint the truck and the bed separately you will get a much better job done to the truck with the bed off it and this will allow the painter to do a much better job on the frame! Good luck its a bit of work and time but nothing complicated.
Karl
 

jaws4518

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Steel Soldiers Supporter
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Abilene, Texas
Yeah, I concur on that. If the existing paint is solid then feather it out and paint over it. My situation with this 1970 Kaiser Jeep XM818 was a extreme case of layers of paint. All of the panel gasket rubber is rotten. The paint has caused binding on hood, doors, and anything that adjusts or moves. Since the tractor was in great shape I decided to take it apart and do things right. There was no midway entry point. The old layers of paint were causing all kinds of clearance and rust problems. I was faced with keeping it as a junker, or restore it like new. I'm still working on it and I hope to have it completed this fall. No hurry, just whenever... Anyway, get a needle scalier if you do not have one. It will take the paint off where blasting becomes impossible. I power wash also, but that has its limitations too! So, the answer to the "method" is everything which has been discussed. There is no single method.
 
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