I'm doing the red masks in two separate sections, the upper body first.
The upper fins were stuck down on masking tape on some cardboard. These photographed an orange color - the real red is shown below.
On the right are the fin spikes, sprayed gloss black.
Even though the upper fins were set root edge to root edge, some red paint still got into the crack.
On the left is the before,
On the right is the bare balsa after sanding the paint off with a block.
These upper fins will be only "end glued" with no fillets so you need a rough, bare surface for the glue to be absorbed. Why no fillets? White glue dries with a flat finish. To gloss it up would require a clear coat, something I'd rather avoid.
You can still see the roughed up root edge line under the paint.
I carefully scraped away the paint down the line not getting any wider than the 1/16" thickness of the fins.
TIPS: Use white glue for a visible joint like this. The white glue will dry clear and not be noticed. Yellow glue will dry yellow and be unsightly.
After the glue dried, I applied a drop of medium super glue with a toothpick at the base of the fins.
With this drop of glue at the rear of the fins it won't be noticeable. Hopefully it will strengthen the joint a bit.
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