I haven't posted here for a while. I think some of you might know about what I'm asking here. I want to add a box to my folding flatbed trailer so it can store my lawn tractor out of the rain. Also to keep chainsaws and stuff safer on the road without a lot of tarps & tiedowns. I would like to be able to toss it in the fireplace some day and IIRC there are restrictions on what I can burn in NY state. Pressure treated lumber is definitely out, painted is out too I think. Plywood may be out depending on the glue, and cadmium or zinc fasteners would be out because I shouldn't burn them.
I'm thinking linseed oil might be enough protection if there are a few of coats, and it's from a plant so it's basically firewood already. I may need the plywood to keep it lightweight enough. I think Elmer's type glue would help, I like gorilla glue but don't know if it's a crime to burn it.
Ironically the usual thing is to take the stuff I shouldn't burn to a municipal waste facility where it will likely end up burning at a garbage-to-energy plant that's usually upwind from me.
I'm open to common sense when available, and I guess if a wood structure rots & burns enough times it will be just as eco-unfriendly as making the whole thing with epoxy.
The question is how long will last after how much work to build it. Even an all metal one might have value when scrapped.
Any thought or suggestions? The size is roughly 4x8 and as tall as necessary. I can overhang the wheels & tongue a little. I plan to do 65 mph when I travel, so it can't be flimsy.
I chose this picture from a thumbnail, the trailer as-is is on the left. Extra stuff shown is for your entertainment only.