How to remove swirl marks in SFGW

After you have completely finished cleaning and rinsed your SFGW, let it set out to dry for an hour or two.

Where ever you see discoloration (swirling) on the pieces, pour White Distilled Vinegar DIRECTLY onto the SFGW.

Using the white side of your pink/white sanders, sand briskly working up a paste. Keep the sanding pad dipped in the vinegar if necessary, to keep the area wet as you sand.

RINSE VERY, VERY GOOD. (remember, vinegar is an acid when dry)

Repeat process if necessary.
Rinse under hard running water.
Its now ready to fire to bisque.