Got maybe 1/3 through my first really involved home improvement project yesterday. Our basement has a bulkhead door that's letting in water through rusty holes, and upon further investigation the whole thing was resting on rotted wood and expanding foam.
I fully detached it from the doorway and started to replace the rotted boards with new PT lumber. Took a scraper and sanding sponge to the rust, and started priming with rust-oleum primer.