Koa table top trouble

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Forum topic by DanFinn posted 01-08-2014 04:58 PM 1230 views 0 times favorited 6 replies Add to Favorites Watch
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5 posts in 2015 days

01-08-2014 04:58 PM

Topic tags/keywords: koa penofin finishing trouble

Hello everyone,

I am having trouble finishing a Koa coffee table top. I will tell you what I did and let you know where the problems started.
Sanded from grits 60 to 80 to 150 to 220
then applied penofin interior penetrating oil (wiped on, let sit 15-20, remover excess/wipe off). Then I let it sit over night (about 13-15 hrs). Next I wet sanded with the penofin oil with 600 and then 1500 . Wiped off oil and recoated with fresh oil and let sit for 15-20 and wiped off. I immediately noticed that the darker grain had a cloudy and slightly gray hue. Let sit overnight to see if it cleared with curing. No.
So this morning I tried sanding back down to 150, then wiped with mineral spirits, let dry, and applied another coat of penofin. It still looks like there is a cloudy gray hue in the dark grain. I’m thinking I should not have wet sanded with the penofin.

What is the problem and how do I remedy it? (my current plan is to let cure for 3-4 days and if no improvement sand to bare wood and start over without the wet sand).

Thanks for your help everyone

6 replies so far

View DanFinn's profile


5 posts in 2015 days

#1 posted 01-09-2014 02:38 AM

Also, it says on the can of penofin that it can be wet sanded like that. Maybe too fine a grit and abrasives worked into grain?

View KayBee's profile


1083 posts in 3660 days

#2 posted 01-09-2014 03:08 AM

The only time I worked with koa, it was finished with lacquer. Sorry that doesn’t rally help. Maybe let it sit for 2-4 days before doing anything. Oil finished can take forever to dry.

-- Karen - a little bit of stupid goes a long way

View DanFinn's profile


5 posts in 2015 days

#3 posted 01-09-2014 10:11 PM

I’m going to let it sit until monday and see how it looks.

View ScrubPlane's profile


190 posts in 2610 days

#4 posted 01-09-2014 11:31 PM

I love working with Koa and cringe when I see problems with this awesome and expensive wood.

What was the humidity like the day you applied your finish?

View Danpaddles's profile


573 posts in 2726 days

#5 posted 01-09-2014 11:35 PM

Monday may even be too soon. What was the age of the oil you used? I’d say, wait wait wait. Then, next time, try a different finish!

-- Dan V. in Indy

View DanFinn's profile


5 posts in 2015 days

#6 posted 01-10-2014 08:16 AM

@ ScrubPlane: I don’t know if you live here on the big island, but it was about 4/5 days ago when that big storm was rolling in, so it was up there.
@Danpaddles: I am thinking about waiting until i can wipe without oil coming off (to a reasonable degree). Also, it was a brand new can, just opened for table top.

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