I also use the R/O 2X. I mask and spray right over the Varathane stain coat I use first. I've found Varathane to dry almost immediately. I use Polycrylic dipped over the finished and crested shafts. I don't thin the Testor's and sometimes the cresting comes out a little thick, but the one time I did thin, it ended up being almost see-through. I use various Testor's modeling brushes; for wider stripes, use as wide a brush as you can. For fine lines and pinstripes, use the smallest detail brushes. Testor's is quite low odor (relatively speaking), and can be used indoors without the wife throwing things at me.