I have been using a variety of adhesives called Gorilla for all different materials on my RAF fire tender. This adhesive is slow setting , so this allows you to position every thing in the position required. Then hold in place with fixing pegs or clips. Adhesive takes about 12 hours to cure.
I am in the same situation as you, I have taken over the loby along with the frezer to carry on with my Aerokit Fire tender model. No need to rush to finish, as who knows when we will all be able to get on the water.
Very nice model. I am in the process of building a RAF 46" fire tender from a kit made by aerokit. I started building this 45 years ago, the main parts of the hull had been built then my children came along so the kit went into the loft and got forgotten about until our first lockdown came. The model is now nearly finished and ready for its first outing on the local lake.