I enjoy painting tin cans, their like a mirror reflecting images
that surround them.
I usually use a sponge to varnish my paintings, the ones at Home Depot
I found to be the best, they leave a nice smooth finish. I get a bit lazy
when it comes to cleanup, I varnish quite a few paintings at the same time, then
toss it. I also use water bottle caps taped on my palette for my
medium, Liquin original, if there is some left over I put it in a sealed
container until the next sitting. I try to think of anything that makes life
a tad easier.