Hi. I posed this question to the turner's forum but was advised I'd be better off asking you seasoned experts on the subject. I made a walnut wedding platter which I plan to send out to get laser engraved. The platter is sanded to 400 grit. I was planning to use high gloss wipe on poly as a finish, but several people said not to use poly on walnut. The engraver asked me to apply one coat before sending the platter. Does anyone think this is a bad idea? I'd hate to mess this thing up now. Alternately I was considering Bush Oil, which I believe has varnish in it, and then maybe the wipe on poly over it? Suggestions appreciated. Thanks. Ed