How should I finish these solid teak French doors for my home office?

Wipe the stiles and rails down with **acetone** or denatured alcohol immediately before you apply any sealer. Mineral spirits can work, but acetone is better at stripping those surface oils quickly so your finish doesn't stay tacky. If you don't pull those oils off the surface right before the brush hits the wood, you'll likely run into curing issues where the finish takes days to dry or just peels off in sheets later.

For the finish itself, a high-quality **teak oil** is the standard for a reason. It maintains that matte, natural look without building up a thick film that looks like plastic. If you want a bit more protection against hand oils and dust, look at a wiping varnish. Something like Waterlox works well becuase it penetrates the wood but still lets you build a slight sheen. Just avoid heavy, thick polyurethanes. Teak has a beautiful tight grain, and burying it under a thick plastic coating ruins the whole aesthetic.

Dealing with those six-pane inserts is a nightmare if you try to tape them all. Use a liquid masking solution instead. You brush it onto the glass, let it dry into a film, and then you can paint or stain right over the edges. And once everythign is cured, you just score the perimeter with a sharp utility knife and the mask peels right off in one piece. It’s way faster than trying to be perfect with a sash brush on twelve diffrent windows.

Make sure you seal the top and bottom edges of the slabs before you hang them for good. Most people skip the ends because they aren't visible. But that’s where moisture exchange happens most. Even on interior doors, sealing all six sides prevents the wood from moving too much when the HVAC kicks on in the winter. Teak is incredibly stable, but it's still wood, and those large bottom panels will want to expand and contract if they aren't sealed properly.

I’m planning a much smaller teak project soon and that tip about sealing the top and bottom edges is something I totally woud’ve skipped. Does the acetone dry the wood out too much if you’re doing multiple coats? I'm always paranoid about the grain cracking.

Also, with that liquid masking stuff, how careful do you have to be around the wood? If I accidentally get some on the stiles while brushing it onto the glass, does it stain or come off easily? I’m still pretty shaky with a brush and don't want to leave weird marks on the finish.

Keep in mind that teak has a high silica content—basially microscopic sand in the grain. It’ll dull your sandpaper or scraper blades way faster than oak. If you’re doing a final pass before the oil, don't go much past 220 grit. Sanding it too smooth can actually prevent the oil from penetrating deeply, leading to a blotchy look.

Regarding the liquid mask, if you drip on the wood, wipe it with a damp cloth immediately. If it dries in those deep teak pores, it’s a nightmare to remove without sanding that area back down, which usually leaves a noticeable light spot once you finally apply your finish.

If you're worried about the liquid mask on the wood, keep a damp rag handy. Most of those are water-based and won't hurt the grain if you catch it quick. Just don't let a glob dry or it'll seal the wood and leave a light spot where your oil won't soak in.

Also, watch the weight. Solid teak is way heavier than pine. Since they're pre-hung, make sure the jambs are screwed deep into the house framing. I’ve seen heavy slabs pull a casing right off the wall after a few months. Use three-inch screws thru the hinges into the studs so the whole thing doesn't sag on you.

One thing to watch for is "bleed back." Since teak has large pores, you’ll wipe your oil on, think you’re done, and then twenty minutes later tiny beads of oil will sweat back out to the surface. If you don’t catch those with a fresh rag, they’ll cure into hard, shiny spots. I ussually babysit the slabs for a couple of hours, wiping every twenty minutes untill it stops. Also, don't panic if the wood looks slightly greenish or patchy after sanding. Teak is light-sensitive; once the oil is on and the UV hits it, it’ll quickly shift into that rich, uniform gold tone you're looking for.