[C320-list] Third H20 tank frame

[Jeff Hare]

Bob, 

The reason you need to remove the paint is because the paint doesn't have a
good bond with the fiberglass underneath.

In one instance, I epoxy'd a board to the hull.  That board broke free after
a while.  The separation happened between the paint and the fiberglass, not
between the epoxy and the paint.

Given the weight of the water tank with sloshing water, I'd want to grind
off the paint first.

If I were doing that, I'd use a good hardwood that won't rot like IPE and
will hold fasteners for life without having to be glassed in.

-Jeff

-----Original Message-----
From: c320-list-bounces at lists.catalina320.com
[mailto:c320-list-bounces at lists.catalina320.com] On Behalf Of Robert
Seastream
Sent: Thursday, April 03, 2008 7:55 AM
To: C320-List at Catalina320.com
Subject: [C320-list] Third H20 tank frame

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