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Building Tips and technical articles. => Paint and finishing => Topic started by: Steve Helmick on March 23, 2011, 08:09:33 PM
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I know Randy frequently sprays on empty thinner and fuel cans. Is there something else that works well? I was thinking more like white posterboard. It would require a sealer coat first. How about a piece of glass or plexiglass? I haven't sprayed a model since the speed flying days...one coat, one color, epoxy, no topcoat. No reason to do test panels. Since, everything has been brushed clear dope over tissue, or spraycan Forumula U. n~ Steve
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I know Randy frequently sprays on empty thinner and fuel cans. Is there something else that works well? I was thinking more like white posterboard. It would require a sealer coat first. How about a piece of glass or plexiglass? I haven't sprayed a model since the speed flying days...one coat, one color, epoxy, no topcoat. No reason to do test panels. Since, everything has been brushed clear dope over tissue, or spraycan Forumula U. n~ Steve
Steve, I try to save those glossy cardboard boxes some many things come it and test spray on them. I've also sprayed the side of my plastic trashcan. Coro-plast might work too, look around for discarded yardsale signs and the like, most of the store-bought ones are Coro-plast now. A piece of glass might work too and even be reusable. Hmmm, Why didn't I think of that before?
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Corro-Plast....political signs! I could paint them, and put them back, refreshed and improved. Randy, you're a Genius!!!! 010! Steve
PS: I was referring to Randy Powell in the original post, but thanks for answering.
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Steve, any surface that is texture free is appropriate for a test panel if all you are doing is testing color and spray gun technique. Just make sure you are spraying over the same substrate material ie if your plane is dope, then you need to be spraying over dope. One thing to keep in mind, different substrates will cause different "lay down" on your spray coats. as a result of solvent evaporation variances.
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Like recently I was doing a test panel to decide if the undercoat color I was using was going to work under a candy color I was using so using an old thinner can worked fine. But if I were testing something like whether a substrate was going to work with a color coat, I'd probably use something like a prepped panel (balsa built up just like a finish) or something like slick cardboard or similar. Sort of depends on what you are testing.
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Guess I should have mentioned that when I do this I am normally only looking at the spray pattern. If you want comparative results for your finish you need to replicate the base you'll be using.
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I will usually build 1 extra Flap and prefinsish that at the same time I do everything else. Helps to get colours and test panels sorted.
Good point tho - you must do it at the same time.
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Or at least with the same materials.
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Nope MUST be a flap.. I sayz so.
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Nope MUST be a flap.. I sayz so.
Maybe it must only cause a flap? Old F1A wings was my original plan. BW@ Steve