[Public-List] Rudder Construction

[JIRVING104 at aol.com]

I'm stripping 30 years of bottom paint off Scotch Bonnet (#634).  The  
rudder has some large star bursts.  They are about 6" in diameter, and  don't 
appear to go below the gel coat.  Any suggestions on what I should do  to 
repair?  The rudder construction (1979) seems to have a core  construction based 
on looking at the trailing edge with the paint removed, but  I'd appreciate 
any input on what the core is made of.  I'm guessing the  core is solid 
glass. 
John Irving