You can buy "grain filler" which is for this purpose. I have used a water-based wood filler slightly thinned with water and had good results.
--Previous Message-- : --Previous Message-- : :I'm preparing my original pine medicine : cabinet for painting a high gloss White. : The idea being to match other White : sinks,Tub and Toilet. The pine is graining : in spots and I'm looking for a wood filler : that will leave the wood smooth enough to : paint. Do you recommend any brands or : manufacturers? Do you recommend any other : techniques to use to prepare the wood for : painting? : :