Lately I have been experencing poor quality with Tamiya Acrylics, I shake the paint then pour a controled amount into another jar I'll mix with water to thin it out slightly but while brushing on they tend to clump up when you go over the first coat after it has dried and in some cases it rubs the first coat completely off! And they gum up my airbrush too much so I stopped using it with them... And it's 90% of the paints I have bought in the last 3 months from a very busy hobby shop so they reguarly get new batches in. I went to another out of the way hobby store that sold imported Tamiya paints from Japan which I had none of the aformentioned problems which lead me to contact Tamiya's U.S. offices about the problems with the paint via E-mail. Also It makes me want to switch off from them if it constantly continues to be a problem. Also im tending to lean more towards Testors Enamels because of the non gloss finish it has, I don't get brush strokes marks when it dries. I'd love to try out the Games workshop paints at some point after seeing some of the fantastic results with them I guess I need to get around to getting some. So has anyone else had problems locally with Tamiya's acrylics?