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TIME, MONEY, AND ENERGY WASTED!

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  • TIME, MONEY, AND ENERGY WASTED!

    I am putting this information here to help some other "beginner" to save lots of time, hard work, and money.


    PROBLEM ONE:
    After having my 1950 Champion sandblasted I was told that the "wash" that had been applied by the fellow who did the work would be good for 2 weeks and it needed to be primered by that time. I bought the appropriate primer, but as I was talking to different people about painting the car [totally disassembled-nothing else would come off the hull], rust began to show up where it had been touched when handling the pieces while transporting them home and other places too. I was hoping that I could avoid doing the priming by getting the car to A painter quick. Painters do not do things quick I found out, so-
    PROBLEM TWO:
    I got started sanding the rust off and a friend told me that I needed to "kill the rust with phosphoric acid." I bought the acid and as I would finish a fender or whatever, I would apply the phosphoric acid as directed and rinse it off as directed, but as it would dry a brass colored flash rust would appear and at first I would sand that off and treat the piece again in hopes of totally getting rid of the rust-I thought that it was coming out of the shiny metal for some reason. Fortunately, I talked to another painter who told me that I would have the flash rust no matter how many times I sanded and treated the pieces. He said that I should just scuff it off and prime it. Time, sandpaper, time, phosphoric acid and time wasted.
    PROBLEM THREE:
    I decided that since I was priming the metal that the painter would just work from there and that by priming it heavy he would have a good base from which to work and that would help him. I talked to a fellow who works with the man who is now doing the job and he told me to prepare the bare metal by sanding it down with 120 grit sandpaper before priming it. I did this inside and out on every piece and primed every piece inside and out. I worked hours and hours doing this. I suppose the undersides will not need much except for the undercoating that will go on nearly every piece. I delivered some of the pieces day before yesterday to the paint shop. This afternoon I delivered some more pieces and I was quite surprised to see that the primer was all being sanded off and the nice smooth sanded finish I had spent so much time creating was being sanded with a rougher grit than the 120 I had been told to use. I asked about it and he told me that he had to do this to get the kind of finish that he knew I expected on the car. I have no problem with this of course. His work on other cars that I have inspected is great, so whatever he wants to do is fine with me. So, due to my ignorance I had bought a second gallon of primer because I thought that a nice thick coat of primer would be better and I spent at least 3 times as much time sanding as was needed. As it turned out, I only got a mist on the steering column and could even see the shiny metal through it and it layed on my concrete garage floor for at least 4 weeks and didn't rust one bit, so my putting the thick coats of primer on was useless because a thin coat would have protected the metal from rust and time and money were wasted because I sanded much more than needed and used 4-5 times as much primer as needed.

    I know that all this shows my lack of knowledge and foolishness but maybe my putting it on here will save someone from lots of extra work when trying to save money by "preparing" the car for the painter.

    Jimmie
    Orleans, Ind.






    1950 CHAMPION -ORANGE COUNTY, INDIANA
    I'VE SAVED SO MUCH DAYLIGHT THAT THERE'S NO DARK TO SLEEP IN ANYMORE!
    sigpicJimmie
    Orange County, Indiana
    1950 CHAMPION -ORANGE COUNTY, INDIANA

  • #2
    I am very sorry Jimmie that you had to go through that the hard way to learn that bodywork is a serious skill that only experienced tradesmen are good at, and with today's materials unfortunately it just about takes a CHEMIST to deal with it correctly! [:0]

    That is a skill I have not learned, so I have to leave it to the pros [V]


    StudeRich at Studebakers Northwest -Ferndale,WA
    StudeRich
    Second Generation Stude Driver,
    Proud '54 Starliner Owner
    SDC Member Since 1967

    Comment


    • #3
      Boy, is that ever true. Let's all clone Dick Steinkamp's paintman, I say!

      Comment


      • #4
        That's just the learning process; that's all that is. But I might add that I use muriatic acid, about the same, and I have that bronze looking color, but then go over it with metal prep, which contains a very weak acid that eats off the flash oxidation and has enough alcohol to help evaporate the moisture as the piece dries. Ya know the body shop probably removed all of the surface because they can't be sure what you applied or what was under it, or how it was applied; and they are the ones ultimately responsible for the finished product. So; just to be safe, they want to start with bare metal.

        Comment


        • #5
          quote:Originally posted by buddymander

          That's just the learning process; that's all that is. But I might add that I use muriatic acid, about the same, and I have that bronze looking color, but then go over it with metal prep, which contains a very weak acid that eats off the flash oxidation and has enough alcohol to help evaporate the moisture as the piece dries. Ya know the body shop probably removed all of the surface because they can't be sure what you applied or what was under it, or how it was applied; and they are the ones ultimately responsible for the finished product. So; just to be safe, they want to start with bare metal.
          No paint man worth his salt would spray a car that arrived primered by the owner. Other than an $800 paint job, that is.

          Comment


          • #6
            "Nice, heavy coat of primer", unfortunately, that doesn't cut it any more. I have heard that primer, base coat combined thickness is about .002". The clear coat is about .003". So, thick primer may cause all sorts of problems, when being topcoated. For example, as a clear coat dries, it may crinkle up this primer coat, because it is so thick. Not to mention adhesion problems. As an old paint person, we were always told that a new coat of paint has to slightly soften the coat of paint or primer underneath it to adhere properly. Just a few thoughts.... I used to always think that if a little bit worked good, a lot would work a whole lot gooder, and that just isn't the way things work anymore.

            I was told recently, by a glue manufacture that their product is designed to "bond". I said, oh yeah, like stick. He said no, it bonds, that means under ideal circumstances, and using the correct proceedures, and amounts, the two items will join together. No just slapping it together, and having them stick.

            Comment


            • #7
              I've become a big fan of soda blasting vs. sand blasting.
              They say parts are left with a coating that will protect them for a week - don't believe it. If it's humid you'll have rust overnight.
              I wash all parts, blow them dry, wipe with lacquer thinner and shoot with a light coat of etching primer.

              I do any physical body work that way, hammer/dolly etc. then sand back to bare metal before doing any leading or bondo. Some say priming first is an expensive or wasted step, but unless it's a splash & dash re-shoot I'll be spending a lot of time getting the panels right so they need to be protected.

              Steve

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              • #8
                I use glass bead especially to derust areas inside the edge of the doors where the outer skin is overlapped the inner panel. I don't like to use acid in there since it may get in between the panels and just sit there. Sandblasting scares me. I've seen what it can do, even with low pressure. If you rinse the acid off the panels under a heat source,they dry a lot faster and won't require so much metalprep. You guys in high humidity locales have my sympathy. It's amazing how fast a bare panel can turn first gold, then bronze then copper, in just a couple of hours. Acid etching really opens up the metal making it more porous which promotes rust more quickly, but at the same time allows primer to get a much better grip. I try to work the metal before any stripping, and apply filler immediately after stripping, followed by a coat of primer over the wet bondo. That way, I don't have to sand the bondo to get the primer to stick to it, and the primer dust will act to prevent clogging while sanding. Just a few things I've learned along the way.

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                • #9
                  Bare metal will always rust. In the construction industry, 4 hours are allowed after blasting, by which time painting must begin. Also known as the "blasting window". If more than 4 hours pass before painting, the item has to be re-blasted.
                  /H

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