Early in this thread I saw Depron mentioned as being the material of the build Was this so ? If so what glue was used in the build. UHU por or similar brand is usually recommended.Re Glueing metal to plastic good old Gorilla Glue is the one Much cheaper then those others and has good gap filling too.👍
If the deck is also GRP the best bet is to plank it with fine veneer strips then varnish that. If it needs filler between the planks use a black one. Carbon black or similar added to the filler .Brown would also look smart.Artists powder paint could also be used and be cleaner to handle.Lite filler from B&Q is very good .Light and easy sanding and I believe slightly flexible so should not crack out.
A layer of the lightest glass cloth applied with Ronseal water based floor varnish / sealer.Rubbed down between coats. /Use enough coats to fill the weave / grain of the cloth . . this should still show the grain through the coats and leave a brilliant shine. this can be polished with T/cut once thoroughly hard if so desired.
Not quite the same thing but something useful When using say a Bottle of Aliphatic or P.V.A. or similar glue it can get abit messy with lack of control of the flow. Bang good sell small plastic dispenser bottles which you can decant you glue into from your bigger bottle.Makes things a lot neater. Very cheap too
If looking for good low cost ply log onto the Model Flying site and look for the thread by Enrico Eglasias I got a sample from him and it is really good stuff and low cost. Light and strong.A bit darker colour than pine ply but gives a nice colour when clear .varnished.I think the thread title is something like Plywood Supplies or samples. Different thicknesses available. Regards John👍
B&Q stock all colours of paint and looking at their corporate colour I would be surprised if they didn't stock orange paint Humbrol do /did a lovely orange and a flourescent one too. If all else fails go to an angling shop as they stock it for float 👍😊makers