One thing to remember is that acrylic lacquers dry by solvent evaporation. If you ever need to make repairs, you can usually solder right through them or if not, use lacquer thinner, acetone, or MEK to remove them in a small area. Some brands to look at are Plasticote, Krylon, and Tempo. Rust-Oleum makes both a clear lacquer and a clear enamel paint. So be sure to read the label.
Polyurethanes cure by a chemical reaction, and you may not be able to solder through them. You must use very aggressive solvents (e.g., paint stripper) or scrapping to remove them. Anything with the word "paint" in it (e.g., alkyl or acrylic enamel paints) will have similar properties to polyurethanes.
John