It'll do both enhance and darken, the degree isdepending on the wood itself.

If there is "sap" wood in the piece then that will stay lighter than the rest....if it's not stained to "match".

Not every piece of walnut is the same regarding density, predicting the actual color is kinda hard to do.

Generally it will all look good, if the finish is done right....and it will darken to some degree.

The "sheen", and the grain enhancement,come from the number of coats you apply and how diligent you areat rubbing out each coat.

I again warn against using steel wool, it surely does produce a great looking finish...if adequate time is given in between coats.

BUT, it also leaves fibers of steel in the finish that will eventually rust.

Since I produce hunting implements that are used mostly in pretty crappy weather, rain, ice and snow, and more rain....rust prevention is at a premium.

I'm guilty of going all the way down to 800 grit wet/dry paper to get the surface I want instead of usingsteel wool.

Again, the final coats of Tru Oildo not need to be sanded.........................