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same principles apply
you need to cut the indent for the shape & depth of the inlay from the scale, then set it in with an acrylic compatible glue
fill with extra glue then sand flush to suit the...

http://straightrazorpalace.com/workshop/111713-diy-cutting-inlay-strips-inlay-engraving-jig.html
This was my effort with a bit of tutorial if it helps