I'm using some acrylic pearlescent paint on some wood scales I made and wanted to see what's the best way to thin the paint. Can I use any thinner or reducer, or is there something specific for acrylic they would have. It's difficult to get a smooth finish without sanding after some coats, which leaves it a bit dull, and I'd like to have it level itself out rather than sanding down the brush strokes. Any other tips? Also, will acrylic work in an airbrush?