Puckdropper wrote:

We've got a few outdoor/garden tools (like a snow shovel that's older
than I am) that need a new finish on the handles. What would be the
best thing to use for this?

Being outdoor tools, they sometimes get left outside or otherwise
abused, so the finish needs to stand up to this.

Puckdropper

I soak such handles in mineral oil occasionally. I sometimes use spar
varnish or a polyurethane over that, but not always as the tools are rarely
left outside for long.