Hello everyone! I am new to everything about owning a travel trailer. My husband and I just purchased a Ubuilt travel trailer (it is modified from a 78 Toyota Chinook). Yesterday we completely gutted the entire shell which turned out to the best decision. We removed all the old propane
appliances (there was evidence of fire damage), the cabinets, sink, water storages, etc (water damage).
Now we need to seal all the screw holes, old access holes, and large vents. What is the best way to seal the old access holes (propane appliances and water) and the large vents (from radiator and fridge)? I need to put some sort of structural support between the hole before fiberglassing. Waterproofed plywood screwed in? Metal bracers screwed in?