Phase 6: Poly the floor.
The floor is finished. Pictures truly don't do it justice, but I'll show some highlights.
I went back and forth for days on oil vs water poly. Oil has that soak-in ability which really makes the figure of the wood look 3D, but it also ambers wood, and the oils will get darker as the years go by. Water poly doesn't darken the wood, but also lacks the ability to really give contrast to the grain.
I had pretty much decided on Zar "self leveling poly." It seemed to have the least ambering, and rated as the hardest poly after it cures. Unfortunately, the self-leveling part comes from additional solvents and high VOC which means I can only get quarts in PA. I wasn't keen on spending $400 for a finish that meant moving out of the house for a week to avoid brain damage.
I went to Aumen's Paint in Palmyra PA, and spoke to [ironically, yet another] Derek. We probably spent an hour talking about finishes. He always keeps one pint or quart of everything he stocks as store use. I had taken a scrap with me and we tried 6 or 7 finishes. One came through hands down winner. Zar OMU. Oil modified urethane. It is oil/alkyd urethane esters emulsified in a water base. Just enough of the alkyd esters to make the grain pop without darkening. Cures both my film drying and O2 crosslinking and supposedly very hard when cured.
Viscosity I would put right around melted butter or maple syrup. On the thinner side of a typical oil poly and on the thicker side of a water poly
The first coat I put on with a typical synthetic sponge on a stick and found it difficult to work with, so instead I went and bought one of these and jabbed a stick in the handle. This was the bees knees. No edging or snowplowing, just start at one end and go to the other. Drop-ins, starts/stops, no worries. I just made sure the mop was moving before contact. That is probably also due to the OMU's ability to self level.
This is what I used and may never use a normal floor pad ever again. It is a microfiber cover on a T-bar that is marketed for professional window washers. You dip it in soapy water to scrub. This thing ROCKED my floor. $12 at Home Depot.
So, here it is. Like I said, pictures don't do it justice, especially snapshots on my aging phone.