I thought my most recent project would be a good time to try a Tung Oil finish. After all, David Marks swears by it, right? Well, my results have been less than spectacular. After easily 8 coats and counting (2 coats thinned and the rest 100% tung oil), I have yet to achieve anything resembling a luster. I am waiting for each coat to dry (2-3 days) and sanding with 600 grit paper or 0000 steel wool between coats and the darn thing just keeps being flat. Any ideas on what I may be missing? The material is Utile, sanded to 220 before finishing.
Yes, I have learned too late that Marks actually is using a wiping varnish, not pure Tung Oil.
Thanks for any suggestions.
Drew
Replies
A soft satin is the best you are going to get with 100% tung oil--if you have a uniform sheen over the full surface that's about it. It's not supposed to build a film on the surface. If it did that film would be soft and almost gummy. Your technique seems right--plenty of time between coats (assuming it's not too cold), sanding with fine paper between. You might have sanded to 400 before applying the first coat, but I strongly doubt that makes any difference at this point.
I'd give a kidney for a soft satin right now. That's actually just the finish I was going for. All I am getting is more dull (the finish, that is.) I feel like I'm going to die an old man with this table still needing more coats.
Give what you have a week or so in a warm place to become more completely cured, sand lightly with 320 grit and apply a wiping varnish. Waterlox Satin, thinned just a bit if it seems too thick, would work fine for that application. If you want a higher sheen, Waterlox Original/Sealer won't need thinning.
David's show is a bit misleading. He does not use pure tung oil. I guess the director does not want to show David using a product that is not a sponsored product so on most of the shows it is in a glass jar. On a few shows the back of the can is shown and it is a General Finishes product. On his website David explains what finish he uses. Click here. Hope this helps in the future.
Bruce
Drew..
Sorry about you problem. I use pure Tung Oil often but not always. It will never have a 'luster'.. I apply just about how you described your application.
That said, you may want to try some quality wax and a wool buffer to bring up a shine to your liking.
I usually use wax on everything I make though. If an issue occurs when the object is used it is 'sort of' easy to remove the old wax, apply new oil, and re-wax. Like new then.
Or maybe a wipe on Poly. I do use a Poly top coat on occasion but it is much easier to 'fix' oil and wax...
My opinion only.
Polymerized tung oil produces a very high sheen and dries much more readily than pure tung oil.
Chris @ www.flairwoodwork.spaces.live.com
(soon to be www.flairwoodworks.com)
- Success is not the key to happines. Happiness is the key to success. If you love what you are doing, you will be successful. - Albert Schweitzer
Thanks, all.
Drew
I'm certainly no finishing pro, but some of the contributors here are. There's a guy here semi-regularly who once posted pictures of his work finished strictly with pure tung oil. The sheen was amazing -- soft and satiny but a bit more than just satiny. Rich and deep. I've forgotten his exact method, but it generally consisted of soaking the piece in tung oil and then letting it dry for a long time -- several weeks, if memory serves. Then he began sanding tung oil directly into the piece starting at 220 and then working up through each grade to about 1500 or 2000. I gave it a shot on a small box, using BLO instead of tung oil, and stopping at about 1200. It worked well. I didn't get quite the same quality of sheen, because I'm an amateur, but a sheen there was, and the box felt unbelievably smooth. At higher grades, sandpaper soaked with oil turns into a burnisher and polisher.
Anyway, if that poster is still around, it'd be great if he published his method again.
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