This is a little buildalong how I do arrow passes with a mixture of stone powder (earth pigments) and epoxi. I will show this on a hazel flat bow, which I will post in an extra thread.
Bow should be done with tillering and sanding. Perhaps polished with steel wool or whatever you like.
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Strengthen the surface at arrow pass area with a thinned shellac mixture, I do about three coats. This will prevent a fuzzy edging when cutting out the groove for the inlay.
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Cut in the outer lines of the arrowpass with a really sharp knife or cutter. Allow to go a bit lower than top edge of the handle. The shelf and/or the leather will cover that. Now hollow out about 1-2mm deep.
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On this specific bow here, I had done already the staining of the back in green and brown. For matching colors the pass comes also in these colors as a two tone inlay.
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Mix epoxy, divide in a one third and a two third piece and mix it with stone powder (earth pigments). I get mine from “kremer pigmente”
http://kremer-pigmente.de/en. This is absolute the great stuff, used by artists and restorers. I use it also for paintings on my Indian bows (in this case mixed with thinned hide glue).
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Fill the hole with the green mixture, take a bit of the brown and stir it in the green with a needle to get the marble effect.
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Let it cure until the epoxy is getting harder (no deepening with fingernail), at this time it is easy to cut off the excess with a knife.
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Let it cure completely, sand it down to the matching surface. Make it a little convex to get a minimum of arrow contact.
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Polish with steel wool and finish the whole bow inclusive the arrow pass with whatever you want, I use my homemade mixture of hard oil.
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Ready! Now you have a clean surface, even with the wood, you can’t feel any difference with your fingers.