I used this stuff for the first time about a month ago. Seemed to go OK but was only on a few parts for the VS. Probably no more than 15-20 mins actually spraying (excluding setup and clean up.) When I get to larger batches of parts I expect that there will be some down time with the gun due to changing out parts, taking a short break, etc. I've read that if you let this stuff sit in the gun for even a little while, it will gunk it up (not to be confused with the 8 hr pot life of the mixed product that hasn't been sprayed.) I'd hate to have to clean the gun out every time it's idle for 5 or 10 mins during a 1-2 hour session. Is this a problem or do I spray lacquer thinner through it every tie I'm going stop spraying for a bit during a session? Much thanks!