Everyone is always complaining about how much weight thinned epoxy would add... you should really try measuring the difference sometime... I have...

You could coat the inside of a fuse ( I did ! ) of say a .40 or .60 sized trainer, and you end up adding a WHOPPING .5 oz to the whole plane...

Sheez, a lot of extra weight, yeah right....

For a small light plane, this MAY represent a lot of weight, but for something like the Sundowner, go for it...