With all of the DIY-ers on this august forum, I figure there must be someone who has a clever idea of how I can re-purpose my old sunbrella boat canvas. Top all sunbrella, side curtains out of vinyl isinglass, and a drop-curtain of vinyl isinglass too. Seems a shame to just chuck it out.

Thanks fellas

Looks like you could use a new hat.

Stuff sacks for whatever out of the Sunbrella., if you know someone with a commercial sewing machine.
I have so many camping things that I wish I had stuffsacks for. A friend made a nice stuffsack for my mess kit out of a Sunbrella type material.
Even a sack for my zero-gravity chair....I hate stuff grinding against each other when traveling.

On the side curtain material you could make water resistant map sleeves or clear sleeves for building plans.

Makeshift green house / high tunnel? Vinyl windows for sunlight and zippered parts for good airflow. Zip up at night to keep tomatoes or "whatever" nice and warm.
I don't know - might be a bit janky looking but could possibly work in theory. Maybe.

or body bags.

All great answers! Some with more entertainment than utility but still. A green house for my smaller planter boxes is great. I use 6mil construction plastic from Home Depot currently but the isinglass prolly blocks fewer frequencies.

And bodybags?!?! What a horrible idea!! The top is teal green so everyone would know it was me...

I was gonna say greenhouse but Nick beat me to it. Might be a great way to start veggies in the spring. Especially if it somewhat portable. Move it every few weeks as the seeds get established.

Don't most 206ers get their stuff sacs on Capitol Hill?

LOL
They could make hot pants out of the clear stuff and show those sacs off on Capitol Hill.