hey man, this thread started less than a month and a half ago, and your work has improved significantly in that short time! one tip i could give would be to not practice on glass. i read that and heard from many different sources that you will never stripe on anything that's the same texture of glass (unless you're planning on doing storefront window lettering), so it's not a very accurate practice media. i switched to practicing on a piece of aluminum plate, and my lines looked a lot better for it. the brush didn't wash out in the curves like it did on glass and the paint just seemed to lay out better in general. i see you've moved on to painting on many different surfaces, but just thought i'd encourage you to give up on glass altogether. do what works best for you in the end, though!