I have a sterling Denight Special I'm covering with silk. The only open area is the rear of the fuselage. When covering the sheeted surfaces, in a few areas, i have a few bubbles in the silk and a wrinkle. What i don't understand is they weren't there before i applied the first coat of taughtening butyrate.
Here's how I've been doing it:
Sand bare balsa till smooth
1 coat clear thinned 50%
Light sanding to remove fuzz with 220 grit
1 coat of clear thinned 50%
light sanding with 220 grit
lay wet silk over area, seal border with clear thinned 50%
when silk is dry, trim off excess and brush on clear, thinned 50%
I've tried to re wet the problem areas with clear, put a few pinholes in the silk and rub down trying to get the silk to lay down, but it has not yet worked. The only reason I can come up with there was something on the balsa keeping the clear from sticking, but i can't see what.
What am i doing wrong?
Any advise??