Mr. Color Leveling Thinner

I haven't had to wait overnight. I spray the Gunze lacquers. I sprayed Gunze's Mr Surfacer primer cut with levelling thinner about 4 hours ago. I was handling it after the paint session. Started playing kickball with the lads , so I'm just now masking.

I've been using Leveling Thinner for Tamiya paints for maybe two years. It works great for my situation; long warm season and low year-round humidity. I don't have any problems handling the work within an hour except for spraying at cooler temps, then to be safe I'll let things sit for a few hours or overnight.

Suggest you try testing it at your customary thinning ratios and conditions to see what works best for you.

In my experience it's almost instantaneous drying.  It depends on how thick you put the paint on of course.  I aim for a mix that looks wet when it goes on but dries flat - it takes a bit of experimenting to get that right.  When I get it exactly right, part of what I have painted will be dry when I finish the rest of it, but sometimes it will take a few minutes.  Now, if I'm going to do anything like masking it, I will let it dry overnight at least but better 24 hours.

Regards, Phil