@SquareRoot,
I was going to suggest polyurethane but so many on this site a dedicated to keeping their Square stock, I didn't know if you were one of them or not. I'm a hot rodder and unless it's just not practical to leave a thing stock it will be removed and something better is going in it's place. But I like mixing it up, some stock, some race, some upgraded stock. Like my ignition, when I first bought my truck back in '81 it was suggested to me by a auto parts store guy, that "Blue Streak" ignition parts were better than stock. I started using them instead, and they did work better and held up longer.
So I adopted that mindset from then on that if there was something better to replace a stock part with, I was going to replace the stock part every time. Like when I was rebuilding my truck, where ever it was practical to replace a OE bolt or fastener I replaced with stainless steel because of the low to no rust or corrosion to either the fastener or the surrounding area around the screw or bolt. Like the headlight bezels, all those long screws in my truck are stainless screws. Those stock screws right there rust and cause the nut plate to rust and around the nut plate on the radiator support rusts. Since I used stainless screws there is no rust anywhere around the bezels. Just stuff like that trying to get as much time out of my truck as I possibly can.
And so I have upgraded or race parts all over the truck. You can't see them mostly, but I don't ever have to worry a part of my truck is going away or will need to be replaced because I need to do stuff to it due to rust or whatever. That if I was to use a better part I wouldn't need to worry. But because of my desire with keeping it stock, factory, there's it goes falling apart. I know the truck is built with the understanding that it was "designed to fail", but I feel that if you can put that off as long as you can then not doing it is accepting that fact, like "Oh well."