whats the best way to fill the grain , (its that bit of wild grain with little holes) a chap asked me to do a bit of painting for him and i got payed with a bit of mahogany about 90 feet of r/sawn ranging from 7inchs to 13 inches . now the wife wants me to make her a display cabinet with some of the wood ,i have looked in fww and will be doing the joints (tansu style )i would like to try doing a shellac finish,but thats a little way in the future . should i mix a bit of sawdust with sanding sealer or is there another way ??