About 7 or 8 years ago, we at Samick Canada (R.R. Loewen Distributors) experienced a similar problem with milky haze only on the satin finishes. >From that time until the present, Samick used polyurethane, not polyester, for its satin finishes and I sympathize with anyone who has had to undertake any manner of touch-up on these 'plastic' finishes. As they resist both traditional lacquer and modern polyester techniques, a hybrid approach is usually necessary. Our experience with this peculiar haze was that it appeared only where foam (polystyrene?) packing touched the cabinet parts. Perhaps the finish hadn't cured sufficiently and reacted with the residue on the foam packing. Fortunately, almost all of the affected cabinets were restored by thorough rubbing with an automotive compound called Car Groom Final Finish. Other petroleum based automotive compounds worked effectively as well. Subsequently, Samick began applying a plastic film 'cling' wrapping on all pianos prior to packing and the problem hasn't resurfaced (no pun intended) since. Trouble is, we purchased many cases of Car Groom which we no longer required. My car has never looked so shiny! Best regards to all, Stan M. Kroeker, RPT On the frozen Canadian prairie
This PTG archive page provided courtesy of Moy Piano Service, LLC