This is how I plan to weatherproof the the outside of the teardrop:
First I cleaned up the curves (more chiseling and sanding) and cut away the overspray from the spray in insulation and any errant glue goops that I could find on the walls and frame.
AND MORE PREP
Then I sanded and coated the outsides of both walls and the bottom of the floor with a coat of marine spar varnish which I thinned out with mineral spirits.
SHINY SPAR VARNISH
This is the bottom of the teardrop which will sit on the trailer bed and be exposed to the elements. I put on a couple heavy coats of spar varnish and I’ll have to add some more waterproofing on top of that, probably something like tar or bed liner.
I used a little wood filler on the outside skin of the walls to level out holes from screws and jagged cuts.
CUT THE DOOR
I also cut out one of the doors. I can finally see a little trailer taking shape.
A lot more door to make but this is a start.