I've been able to find thin brass washers at one of the local Ace hardware stores (in the plumbing department) that work well under plate bolts and nosebolts (that are not countersunk). I also found this online: http://www.phoenixspecialty.com/?gclid=CM6S3bSukaACFR6lagodxmI_eA We countersink the pinblock screw holes (and any other countersunk holes in the plate) after the primer coat and again after the finish coats (like Ron mentioned). I've tried just about everything else to eliminate chipping when installing the screws to no avail. We do the same for the hitch pin holes and tuning pin holes that are getting tuning pin bushings. Someone mentioned that one of the supply houses sells pinblock screws that have a bevel ground on the bottom of the head so it doesn't contact the plate finish when driven home. I haven't tried these because the countersinking works. As far as primers, automotive polyester primers work well because they are catalyzed and dry hard, minimizing duplex plate and aliquat indentations. The downside is that the auto products are costly and very nasty to work with. Michael Spreeman www.RavenscroftPianos.com _________________________________________________________________ Hotmail: Free, trusted and rich email service. http://clk.atdmt.com/GBL/go/201469228/direct/01/ -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech.php/attachments/20100226/b6247bdf/attachment.htm>
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