Good morning gentlemen. I have come to the stage in my build if the US army tug boat from model boats magazine where he done an early
Float test, he sealed the hull using dope and tissue however I have none of this to hand and am doing this build on a budget as it’s for my youngest son. The float test was done before the prop tube was fitted and sealed over with adhesive tape to prevent leakages as stated in his article. I was wondering if a layer of clear varnish would work to seal the hull allowing a brief test to sort ballasting? Allowing me to sand back when it’s finally time for paint.

Regards
Jordan.