How to Prevent Fisheyes
With proper surface prep, you can ensure a blemish-free finish
Synopsis: Find tips to repair fisheyes and prevent them from showing up in your finish in this short article by woodworker Sean Clarke. These unsightly blemishes can show up on a film-forming finish if you don’t take the proper precautions. And if you already have the problem, Clarke offers three methods to make fisheyes disappear after the fact.
From Fine Woodworking #170
We’ve all had a flawless film-forming finish become marred by a few dimples or craters. Known as fisheyes, these blemishes persist no matter how many coats of finish you spray or brush on.
Fisheyes aren’t a reflection of the way you applied the finish, but rather the result of uneven surface tension caused by impurities or open grain on the wood’s surface. Fortunately, there are several ways to deal with fisheyes, either by preventing contamination of the wood or by repairing the damage without stripping and refinishing…