Hi guys, hope someone here can help me on this one. I have been modelling more years than I can shake a stick at and I have always used Humbrol enamels. Over the last couple of years I have had major issues with their quality so I have decided to go over to acrylic. I am at the moment trying Tamiy acrylics and spraying using an ancient Badger 200. My problem is, the paint seems top go onto the model with a dusty, sand like finish. Anyone got a clue as I have never seen this before? Any help or advise is as always welcome.
Sounds like the possible cause is too much pressure, what are you using as a propellant source? The badger 200 is an excellent tool, I have two and they've never let me down. I use Vallejo Air paints which are air brush ready, I spray at between 1.5 and 2 bar using a compressor.
thanks for the answer mate. I am using a compressor with air tank, although it is not ths small desk top mounted Variety that most modelers use. It will run at quite a high pressure (to run power tools etc) but the presure used on the airbrush is regulated by a tap the leads from the air tank to the air line and so can be turned right down to almost nothing. i have used it like this for many years with enamels and i never had any trouble with it, nothing like this anyway. having said that, i moved house a not so long ago and it is possible that the air pressure is too high but without a presure guage it would be difficult if noit imposible to find out what the pressure actually is..you are right about the badger 200 its been a little gem and never let me down but it is rather old and i was wondering if a seal might have gone somewhere?
I'm a recent convert to Tamiya and can confirm that they seem to 'dust up' if sprayed at too high a pressure. I now thin with cellulose and turn down the wick and it goes on a treat. If there is any roughness you can smooth it out with a bit of old denim.
Thanks for that peebeep, I didn’t think of using something like denim to smooth things out. From what I’m hearing it may well be that im spraying at too high a pressure. As for thinning it out with cellulose, well im not too sure. There seems to be so much conflicting advice about what can and cant be used to thin acrylics and it all seems rather confusing lol..Think ill stick with water for now lol
Thin by eye until it looks/feels right. Usually you don't need very much. In fact Tamiya will spray neat if you turn the wick up, but that may lead to the problem reported by the OP. Un-thinned or very slightly thinned paint is ideal for whites, yellows, reds etc because you can spray continuously to get the coverage, but it may need smoothing down afterward. It's a trick I learned off of one of the Phil Flory videos.
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