Hi All
I use fibreglass resin inside and outside my wooden boats, but, with areas which are going to be a problem getting to like under the deck for example.
I mark out all the glue down areas on the deck before I install the bottom hull panels.
These I mask up and apply resin to the rest, remove the masking tape.
When you get around to install the deck you have a glue line area to work with and end up with a good water sealed model.
I have started restoring an old gas racer which had resin coated inside the engine and radio bay but not forward of the engine bay.
With damage to the bow at some point water as leaked in a rotted some of the stringers but the frames are OK.
The outside had been glassed, so it's in good shape with a few dents.
The side deck areas are not sealed underneath so I will remove these and seal as stated above!!
Plan on installing a brushless motor with a surface prop setup.