Bob: I have some information supplied by Kawai regarding repair of polyester finishes. To reply to your question, here is a chart of resin/hardener ratios and correlated temperature variation: For each 5 cc. of resin- | Temperature F | 40 | 59 | 68 | 77 | 80| | Hardener Drops | 19 | 14 | 11 | 8 | 6 | If you haven't done poly repair before, I have more info if you need it.
This PTG archive page provided courtesy of Moy Piano Service, LLC