On the floaters....it's best to let the better half swat at them since I have two. That way she thinks she may have gotten one of them ☺
I've been using the Rust-Oleum Crystal Clear arcylic lacquer. I did a test last summer with the air brush. I sprayed Rust-Oleum Crystal Clear lacquer, Tamiya TS-13 Clear Gloss, and Pleadge Revieve-it. All three looked about the same. I have my test posted here somewhere.