STEP 1
On the left, a lower fin with a brushed on coat of thinned CWF.On the right, another fin after sanding smooth with 400 grit. 90% of the grain is now filled.
STEP 2
Here's the front and rear fins after sanding down the Duplicolor filler/primer that followed the CWF. The grain is 100% filled.Balsa grain filling can be a simple two-step process. After spraying with color coats there shouldn't be any visible grain.
Saving Money!
TIPS: You don't have to throw away sandpaper when if gets loaded up with filler/primer.
Buy a soft brass brush, I got mine from Home Depot.
Brush off the gunk with the brush under running water. Use a circular brushing motion.
Here's the same three pieces of 400 grit,
ready to go again!
I wouldn't recommend wet sanding on balsa and Kraft body tubes. Both will absorb water and swell up.
