We'd buy Micro Balloons at Sheldon's Hobby Shop in San Jose. The 'gap-filling' qualities of baking soda were quickly replaced with much preferred 'Micro Balloons', (they look like baking soda, but 'finer'.Micro Balloons are a synthetic material, developed specifically for strength in filling Sand smoother, yield a stronger finish.)īaking soda is a food staple, stonelike in structure, and would crack after a season.
'Crazy Glue'.('Hot Stuff') We used this a few years back ('80s) for finishing rough surfaces on what would become glasslike finishes on large scale wooden model airplanes.
