I'm very happy with the results, using Diamond Clear on a couple of custom signs. I have always tried to do top quality work, but clear coats have failed many times in the past. Yours has worked great so far. The only concern I have is with storage of the unused portion of the quart. Can this be done? My first quart hardened solid in a couple months, despite the lid being on tightly. I had used about half of it. I don't use a lot, and not too often. But I will definitely consider becoming a long-term customer. Most other solvent-based enamels, I can 'drizzle' a thin layer of thinner over the top of the paint, and it will stay liquid. Can I do that with the Diamond Clear, or is there another way, or............? Thank you.