> Which finally gets to my point: What are the allergic affects of the tree, its raw sap, the liquid lacquer, and maybe for hypersenstive/reactive urushiol allergies, the finished lacquer?

The Wood Database can be a useful practical site for this sort of thing. I found [0], a page for a different wood which is said to contain the same allergen:

> The sap contains urushiol (the same allergen found in Poison Ivy), and can still be irritating to some sensitized individuals even after the wood has been dried, and sap can also seep through some wood finishes to the surface of the wood.

Same as poison ivy? Count me out if true: I react badly.

[0] https://www.wood-database.com/rengas/

The Wood Database? Thank you for once again reminding me how incredible the Information Highway once was, and could be.

I lament our detour onto the Commercial Highway.