I have a 9x2' top for a media cabinet and I'll be using General Finishes high performance satin topcoat. Unfortunately I don't have spraying capabilities at this time, so I'm planning to brush. I've thinned it about 12% with the GF extender. I did a few test strips on long but narrow scrap and the first coat showed some visible brush marks as well as thirsty spots. The second coat on went a little smoother but not ideal. I'd really like to get a fairly smooth surface. Then I had the idea of measuring out the amount of finish (3.7 oz, given 600 sq ft per gallon), pouring it on, and spreading it out with a brush or paint pad applicator thing. Thoughts? I'm in very dry Colorado and shop temps are 65-75. Thanks.