I had previously circled some bubbles between the core and glass on the spar that needed repair. Today I sanded them clean to get ready to micro and glass them. This will allow me to move on with hard point installation.
Using 60 grit, I sanded away the bubble being very careful to cause minimal damage to the core material. I deglossed the surface about 1″ around each bubble to prep for glass.
A closeup of some sanded bubbles. I’ll vacuum these out, clean the area with acetone, fill the bubble with micro and glass with one layer of BID.