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Master engraver William Laskin’s legendary filler stick accents delicate lines on shell and pearl inlay (works on metal, too). Years ago, Laskin created this special blend for his own use, and it’s been unavailable to the public. Until now…
1. Use the specialty blend exactly as it is by rubbing it over the incision cuts until the entire cavity is well filled.
2. Wipe off excess with a paper towel or other stiff cloth. Soft fabric or tissue paper tends to dig into the cut and won't leave the filler flush if desired.
3. Touch up any visible cuts that have been overlooked or not fully filled.
4. Sand the inlay with paper no coarser than 320 and wipe gently with a cloth.
Fretboard engravings are subject to wear on the strings and fingers, which could eventually strip the filler from shallow lines. For this reason, the more elaborate recordings are often located far from the positions most commonly used for playing. But a top coat will help preserve the filler.
Apply a finish:
To ensure adhesion of the finishing coats, a sealant is required. A flexible vinyl sealant is best, but any sealant compatible with the coating, especially the one recommended for metals, will do the trick.
Spray the sealant 3 times letting it dry for a minimum of 24 hours (a couple of days is better), sand with 180 or 220 paper, and finish as usual. Be careful not to sand beyond the sealant. If the surface is uneven, finish the remaining areas with extra-fine steel wool.