The crossmembers on my trailer are 2" square tube, with the ends open. There's no way to make that look good. I kept meaning to pick up those plastic, hammer-in end caps every time I went to the steel supply, but I kept forgetting.
I happened to be near the steel supply today, and I stopped in. I grabbed 4 caps out of the bin and put them on the counter. I told the guy I kept forgetting to buy them. He told me to just take them. Maybe he didn't want to bother with the paperwork on a sale that small, or whatever.
On the way out, I put a bunch of quarters in the charity gumball machines.
Karma begets Karma, I say.