Quote:
Originally Posted by Electronic M
When your coffee is like tar or grain filler it is time to get it elsewhere.
What is the purpose/effect of grain filler?
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It fills in all the open pores in the wood. Mahogany and walnut are especially rough or "open pored" when raw. If you want to get a nice smooth finish you need to fill them in. It's like grouting tile.
I used to do it with shellac or lacquer sanding sealer by doing many layers and a lot of sanding. Grain filler is much easier and faster.