Estes EAC VIPER #0820, BT-55 Upscale, Part 7, Step 2 - Filling Seams & Balsa Grain

STEP 2:

I use what I've found to be the best filler/primer from Duplicolor. Catalog #FP101.

Here's two fins, before and after the filler/primer sanding. I've sanded with 400 grit removing most all the filler/primer. Anything that wasn't filled after  sanding of the CWF, the filler/primer is left in any remaining balsa grain.

The inside of the tube is protected from filler/primer overspray with rolled up paper in the bottom, also used for a spray paint handle.

The top of the tube gets a some masking tape pieces. 

A single, fairly heavy spray of filler/primer follows. 

Here's the tube after sanding down the filler/primer. 

You can see some grey filler/primer was left in and filled what was left of the remaining seam.

Again, the tube is left a bit fuzzy. This will disappear after the first light white undercoat is lightly sanded with 800 grit.

The Apogee plastic nose cone had a slight molding seam. That line was scraped down earlier and sanded with 400 grit.

The mold line only needed one shot of filler/primer and sanding to surface.