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 Post subject: Cellulose thinners
PostPosted: Sun 05 Mar 2017 22:21 pm 
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Green Star
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Joined: Mon 15 Aug 2016 16:33 pm
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Location: buckinghamshire
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Hello
I recently purchased 5 litres of cellulose thinners from eBay to thin Tamiya paint for airbrushing and to clean my airbrush. I seems to work well for cleaning my airbrush, and initially it worked well for thinning paint. I spray a couple of coats of Tamiya XF-16 thinned with cellulose to my B-17G, and left it overnight to dry, in my garage. The next morning, it was raining very lightly, and I brought my model inside, it got very slightly wet but from past experience I knew this wouldn't effect the paint. But when I got inside I noticed that where the model had got slightly wet the paint was wiping off the model. I repainted it and everything was fine, to stop it from happening again, I sprayed the model with klear but this did exactly the same thing. Has this happened to anyone and can anyone inform me of what I might be doing wrong, or ways to solve it, sorry for the long post, but thanks
Sam


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 Post subject: Re: Cellulose thinners
PostPosted: Sun 05 Mar 2017 23:32 pm 
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Two Gold & Bronze Stars
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Joined: Thu 13 Dec 2007 02:47 am
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Location: Minnesota, USA
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I'm going to take a wild guess because I've never done this exact thing, but I would imagine that when you spray cellulose thinners you are expecting the paint to dry really fast, because "cellulose thinners" can also be used for plastic model cement. It would melt the plastic if it didn't dry super fast. I would further imagine that this technique requires some skills that you haven't quite mastered. That is, if you spray it at too high a pressure, from too far away, the paint will dry (or nearly dry) before it strikes the surface of the model. In extreme cases this will lead to a "powdery" finish but it might just look okay, at first. But it won't really adhere to the surface, and a little moisture or klear or just a good rubbing will remove it. That's what I think happened. You need to spray it on so that it's wet enough to adhere, but not so wet that it eats the plastic.

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 Post subject: Re: Cellulose thinners
PostPosted: Sun 05 Mar 2017 23:44 pm 
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Green Star
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Joined: Mon 15 Aug 2016 16:33 pm
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Ok thanks Dancho, I'll try some things out.


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