You talking about doing something like this to highlight the grain? Not the best example but the best I can find on Google images without knowing the name of the process.
http://farm3.staticflickr.com/2585/5737680811_3b6650a461_o.jpgIf so, I saw a YouTube video over it once where the guy did it with a butane torch. Just passed it over the wood for about 2-3 seconds and it burned like that. Caused a really nice finish look.
[This message has been edited by Ag20?? (edited 1/13/2014 11:49p).]