|Forum topic by bbsherman||posted 08-15-2016 12:44 PM||782 views||0 times favorited||15 replies|
08-15-2016 12:44 PM
First time post from someone fairly new to woodworking.
I’m building a desk and I’m in the process of finishing the top. The top is solid wood – cherry, walnut and soft maple. I sanded down to 220 and began applying a homemade oil varnish with the standard 1/3 (satin) poly, 1/3 100% tung oil, 1/3 mineral spirits (low odor). I’m in a california marine environment – hot dry days, cool foggy evenings.
After wiping on 3 coats (over 3 days) of the varnish and then wiping off with a dry rag after about 20 minutes, i noticed it was slightly streaky in good light. it looked as if you could see wiping marks with some areas shinier and more like a film and others matte and more of the wood grain showing. There were also spots where very tiny droplets formed and when I wiped them down, they created shiny streaks.
i figured it was either that i didn’t mix the satin poly well enough or that was building a film in some areas and not in others—especially noting less shiny/film in the more open pore walnut. With about 1/2 of the mixture left, I added some more (very well mixed) poly and mineral spirits, but no more oil. i applied two more coats (at least 24 hours drying in between coats) and wiped these down evenly with the clean rag i used to apply it, but not with a dry rag. I figured this would better build an even film.
it does appear there is more shiny/film areas overall, but it’s still totally uneven. Some wood grain oiled looking areas and some that have more of a sheen to them and look like the grain is covered with a film. You don’t notice in general overhead light, but with a bright light above the wood it becomes obvious.
Thoughts on next steps? i’m reluctant to add more coats at this point. I’m considering rubbing it down with some 400 grit and some kind of lubricant (water and soap?) or some other way to buff/polish and even things out. But maybe I do need more coats—since I’m wiping it on—to even things out and build a film over 100% of the surface?
I don’t want a full on plastic finish, but since this is the top I did want some more liquid and abrasion resistance than using just 100% tung oil.