Get yourself a small pack of epoxy resin from ebay and seek out all slight delaminations of the plywood frames. Get the epoxy in those split bits and clamp them up. A clothes peg is sufficient if you're short of space. You can put a piece of cling film twixt peg and wood so the peg doesn't stick. Then use the rest of the epoxy to waterproof the insides. Be thorough and methodical. if you sand the model back to wood, use epoxy on that, either through fine model aircraft fibreglass cloth or just squeegee epoxy on all over with an old credit card. it goes much further and gets forced into the grain. it's not necessary to use GRP cloth on everything if it's well built. I have several over-50 year old model boats that are perfectly water tight with decent paint jobs (enamel, of course).

Cheers,
Martin

I think the three windows looks much better than the one big one. Wonder why it changed ? Cost - unlikely the difference can only be minimal. Though the bigger window at the front is likely cheaper than the three porthole in the Sea Queen.

Does anyone know why the Commander has the 'spray deflector' (don't know proper name) on the front cabin, and the Queen does not ?

Hi Laurence, check out the Build Blogs on this site.
There are many covering various 'Seas', including my Sea Scout renovation with lots of tips re painting and varnishing.
https://model-boats.com/builds/view/28209
Last pic shows the 'before' state after 20 odd years in the cellar!
Have fun, cheers Doug 😎

Good example of an early Sea Commander. The original ones did have three windows on each side of the main cabin.

Somehow as time went on the large cabin window appeared in their place.

Build quality looks excellent and it should be a gem after restoration.😋

Hi Laurence-Moar

MY Sea Commander had a brushless 3639-1100kv motor on 3S 5800mah Lipo battery with a 60 Amp ESC and a 40mm 2 blade CNC prop.
Very good setup, a bit over scale speed.
Run time a half hour flat-out.
The boat runs better with a bit of bow down sitting still in the water.
The battery position about aft of frame B3.
I swap my boat for a nice fishing boat( Artesania Latina HELLEN).
Canabus