I have laminated two pieces of mahogany (not sure what kind it is) with a piece of wenge in the middle. This has been subsequently turned into a 1 1/4" diamenter rod about 30" long. This rod will be used to hang a Japanese obi which was used for a wedding ceremony. The obi is made out of silk. Think about this as a tapestry hanger with a silk tapestry hanging over it.
OK - that was the long slow windup.......here is my question. My wood finishing book by Bob Flexner suggests finishing with a rubbing varnish. I am worried about the finish somehow getting into silk over time so I wonder if polyurethane might be a better choice. Does anyone have an opinion on this?