O.K. I'm going to spray Testors dullcote lacquer on my Tamiya model which has been painted with Tamiya acrylic paints. Can I use a lacquer dullcote over acrylic paint? It's hard to find the Testors lacquer thinner, so what else should I use. The Testors dullcote lacquer thinner is hard to find. Should I set these aside and use Testors acrylic thinner and acrylic dullcote instead? They new Tamiya clear flat is not dull enough. It,s getting complicates out there.
Many thanks. Rowdy the cat

Thin light coats and you should be all right. Was my preferred dull coat for years but now use Tamiya clear flat.

I use Testors flat coat as well and I thin it with hardware store lacquer thinner. I spray it on top of Tamiya and other acrylics with no problems.

You have a couple of misconceptions going here. Firstly, Tamiya paints are not pure Acylics in the literal sense— they are acrylic lacquers, and don’t thin well with water like many Acylic paints do. Secondly, Dullcoat is a lacquer, but it can be used over most acrylics, as well as Tamiya acrylic lacquers and other enamels without any issues when properly applied. Thirdly, Dullcoat is a lacquer so it will not thin well with most acrylic thinners. Dullcoat can be thinned with Testor’s “Red Can” enamel airbrush thinner, which is what I use when airbrushing. When in doubt, it's always better to use the manufacturers recommended thinner. In this case, Testor's enamel Airbrush thinner works very well with Dullcoat. You can also decant Dullcoat from the spray can and use it straight in your airbrush (but I like to thin it with "Red Can" enamel thinner. Hope this helps.
VR, Russ

That's what I'll do. Thank you for responding.

I'll take this advice. I do appreciate all the help!