The CWF was already applied in the tube seams. After the filler dried it was reduced with 220 grit followed by 400 grit sanding the filler beads even with the body tube surface.
Next all eight tubes got a fairly heavy single coat of Duplicolor Filler/Primer.
I could only shoot two tubes at a time, so this added 30 minutes to the build time.
After the filler/primer dried -
The bulk of the filler was removed with 220 grit. Sand until you see the white tube wrap starts to show.
I didn't sand all the way to the ends of the tubes. These BT-51 tubes are thin, I didn't want to round over the ends.
TIP: Stick your thumb into the tube to act as a "bumper". With the base of your thumb skin bulging out, the sandpaper shouldn't get close to the end of the tube. Notice the gray primer left around the lip of the tube end.
The remaining primer on the end was taken down using 220 grit on a sanding block.
Notice the lower half of the tube end is white, the upper half is yet to be sanded.
The upper picture shows the tube after sanding with 220 grit. Most all the filler/primer has been sanded off.
Here's the tube after following up with 400 grit sandpaper.
Gray filler/primer is left in some tube recesses and what didn't get filled in the CWF seam treatment. Each tube took 15 minutes to sand.
Build time this post: 2 hour, 00 minutes
Total build time so far: 37 hours, 50 minutes
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