spray into cup then mix. They won't dry fast in a big puddle. Then apply with brush for scratches or dump into airbrush if you have one. Being cheap is always fun. Note, wear wife's glasses you hate or safety glasses when spraying into cup and mabey cut a hole in a peice of cardboard to spray through into cup for a splash gaurd. Splash gaurds don't work if you miss the hole then you go to hospitol.