[exray]

I would like to learn how to get that smooth piano finish without the pores showing. I am aware that a good way to do this is to use filler, but I still don't know what kind of product to buy for this purpose..

There's lots of products out there but this is what I use.
http://www.constantines.com/pastewoodfiller.aspx

Constantine's has created confusion by naming this as 'wood filler' when its actually 'grain' filler as opposed to plain wood filler like Famowood that you use to fill in nail holes and missing chunks.

Reminds me that I need to buy a fresh can

-Bill