Thank you Max. I brush it on when I use the thick moss epoxy. Towards the end I use my favorite Big Jims buffalo glossy epoxy thin down a little bit,and spray that for my final fill coat. Then you'll be able to see exactly what everything looks like nice and smooth if that's what you want in gloss or final sand to take to satin. I've been in all the body repair and restoration for 38 years plus but I'm not really that old. Lol did a lot of painting on custom cars and antiques always strive for what can make it better. J