Each of the manufacturers has their own web page with good information. If you need more specific answers such as for an exotic wood you can ask a pro here: www.woodanswers.com
I'm working on kitchen cabinets for my home. As a hobby woodworker, it's a major undertanking and I wanted lots more info before finishing those new cherry cabinet doors. I found WOOD MAGAZINE Forum on Finishing excellent. Dig through the archieves searching for whatever interests you. In particular look for posts by Jacob Mickley. He's a purist and his explanations are crystal clear. He also has a web site http://www.johnjacobmickley.net/
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