[C320-list] Third H20 tank frame

[Robert Seastream]

Bruce Stanley fiberglassed in his tank frame (the 2X2 lumber strips),  
as 3M 5200 was unavailable to him.  He sanded the paint off the hull  
interior to ensure a good 'glass set.
I'm using 5200.  Need I sand the paint off as he did, or just clean  
and lightly sand the painted surface?  Also, may 2X4 strips be used  
instead?

Bob Seastream
Intuition # 906