There is an area in the bilge that i want move some of the rigging and its in an area where you only have the hull. I want to attach/bond some 3/4 plywood so I can mount some brackets. The area has been painted with the same paint as the rest of the bilge. how can I bond the plywood to the painted glass ? I had planned on glassing ove the plywood but wonder if thats necessary ? thanks m

do you have any pics of the area? you might be able to get away with epoxying it but you really should take the paint of in the bond area first.

You could finish the piece of plywood in advance (completely seal/paint it) and then 5200 it in place.

I recommend 5200 VERY sparingly but this seems like a good application for it.

I actually recently attached a starboard backing plate to the inside of my transom (for a trim pump later) using this method.

The nice thing is that the starboard will never rot like the original piece of plywood did .

S

Dave ... I get you some pic's ...

madbouyz .. not a bad idea ... and actually thats what I aqm planning on .. moving the trim and tab pumps from the front bulkhead over to the port and starboard sides ... I am removing eveything now .. will get some pics and see if you guys have any more suggestions ..... m

I would recommend you grind off the paint down to the gel, at least in the spots where you will be bonding to. It will bond to the paint but the paint might come off of the gel.

I did discover that there is an area where it is 3/4 thicker than the upper sides ... you can see the transistion in the photo . However I am a little worried about attaching the pump brackets with 3/4 screws ... stock brackets had two bolts thru to the back of the rear seat ... I would like to have bolts glassed in ? pumps are not real heavy ....10-15lbs ? but there can be alot of bangin around ... do I need to add more plywood so I can install some bolts ?
Also found some rot in the center bulkhead that runs from the transom to the fuel tank area .... I'll get some good pics of that area and see what you guys think ...m

Have you run it since attaching it with the 5200? The guys at the supply house I buy my starboard at said nothing will glue to it well.

Correct, 5200 will NOT bond to Starboard. It may hold it in place for a while mostly due to suction but not for long or with any kind of strength.

I did take precautions to ensure a good bond and so far it certainly seems to be there permanently but the new pump is going to be through-bolted through the transom anyway so in this case I have no fear that it will let go.

I think that when starboard is new it is still very 'rosiny' ... after a while I have found this 'ages' away a bit and it seems much more receptive to bonding with stuff like 5200.

I wonder if the 5200 offers any shock protection .... seems to stay somewhat elastic ....