Firkin-- Do you have a recipe for laha?
It's essentially Nepali version of cutler's resin.
Pitch mixed with wax(es) and/or a bit of talc, brick-dust or other fine material. Lots of variations.
Pappy mixed some up a while back...Maybe he can give us an update.
If I remember, it was something like:
1 part carnuba wax (pure--usually available as flakes)
1 part beeswax
2 parts pitch or rosin
May not be Pappy's recipe, but I'm pretty sure that this is one of several I've seen.
Melt together without lighting the mess on fire (use electricity) in a pot that will henceforth be used for nothing else.
The trick is finding the few sources of suitable pitch and carnuba wax as they are rarely used for this purpose here. One place that caters to re-enactors sells straight pine pitch and, beeswax isn't that hard to find. Pure carnuba wax seems pretty scarce, but a couple of places sell it.
Fed uses a particular pitch formulation marketed for some type of jewelery-making process. There is a confusing variety of pitch concoctions used for
temporarily attaching stones or metal while working. Which ones to use for permanent or semi-permanent applications isn't obvious to me unless someone says they used it and it worked.
Search for "cutler's resin" on this forum and you should dig up a couple of exhausting and tedious threads

Myself and a guy called ddean had sort of a contest to see who could dig up the most info on the web. There's a bit on Shop Talk archicves too. I ought to look those up myself and get it all downloaded to my hard drive for safe-keeping.