Michael Dresdner

straight talk about wood finishing

Fisheye barrier?

Q: Is there any barrier coat that will allow me to seal waterbased finish on a guitar that has been plagued with fisheye problems, then spray with waterbased over it?
A: I won’t say it is guaranteed, but spraying coat of Zinsser SealCoat usually does an excellent job of creating a waterbased friendly barrier coat. Incidentally, you can also spray solvent based lacquer over waterbased, but if you have classic fisheye problems, they will transfer into solvent based lacquer as well. Unfortunately, guitar shops are notorious for silicone based fisheye problems because some guitar polishes and fingerboard oils contain silicone. Once it gets on one thing, or even in the air, it insinuates itself everywhere.