LumberJocks

Mineral Spirits and Poly Problem

  • Advertise with us

« back to Finishing forum

Forum topic by BinghamtonEd posted 07-12-2012 04:22 PM 2111 views 0 times favorited 28 replies Add to Favorites Watch
View BinghamtonEd's profile

BinghamtonEd

1336 posts in 1023 days


07-12-2012 04:22 PM

Topic tags/keywords: question

So I went do to HD the other day, grabbed some Kleen Strip Oderless Mineral Spirits (NOT the green eco-friendly junk), and a can of MinWax oil-based poly. I mixed them 50/50 and put down a coat on some 1/2” dyed birch ply. When it dried, I noticed that the finish has spots in it of white. So I sanded down, did it again, same issue. So I put this finish on once piece, and then do straight 100% poly on another piece. Once its dried and hardened, I see the white spots in the piece with the mixture, and the one with straight poly looks fine. So I can reasonably assume that my poly is OK. Why would the 50/50 mineral spirits mix cause this? I’ve made wipe-on poly before and not had this issue.

-- - The mightiest oak in the forest is just a little nut that held its ground.


28 replies so far

View A Slice of Wood Workshop's profile

A Slice of Wood Workshop

891 posts in 1827 days


#1 posted 07-12-2012 04:30 PM

Are they white spots or little air bubbles?

-- Tim- http://www.asliceofwoodworkshop.com; Twitter-@asliceofwood; Facebook-http://www.facebook.com/asliceofwood

View A Slice of Wood Workshop's profile

A Slice of Wood Workshop

891 posts in 1827 days


#2 posted 07-12-2012 04:30 PM

Do you have any pictures?

-- Tim- http://www.asliceofwoodworkshop.com; Twitter-@asliceofwood; Facebook-http://www.facebook.com/asliceofwood

View BinghamtonEd's profile

BinghamtonEd

1336 posts in 1023 days


#3 posted 07-12-2012 04:38 PM

white spots, sorry no pics, will try to get some tonight. They’re just a flat dull white.

-- - The mightiest oak in the forest is just a little nut that held its ground.

View bondogaposis's profile

bondogaposis

2528 posts in 1005 days


#4 posted 07-12-2012 05:05 PM

I try to stay away from Minwax. Is it possible that you may have introduced some contamination during the mixing process?

-- Bondo Gaposis

View BinghamtonEd's profile

BinghamtonEd

1336 posts in 1023 days


#5 posted 07-12-2012 05:07 PM

I don’t think so, I mixed the poly in the can with a clean stir stick. I poured the poly and MS into a clean, dry plastic paint cup, mixed the MS in with the same stir stick. Straight poly coat came right out of the can.

-- - The mightiest oak in the forest is just a little nut that held its ground.

View Mosquito's profile

Mosquito

4683 posts in 946 days


#6 posted 07-12-2012 05:24 PM

Take a look at the Mineral Spirits, inside the jug/bottle. I had the same stuff, and at the bottom was a white milky (slightly thicker than milk) residue. Maybe you have some of that in yours, and it’s getting into the mixture? I’m not sure if it was there the whole time for mine, but I noticed it more once it started running out. I only used mine to clean up, though

-- Mos - Twin Cities, MN -- Stanley #45 Evangelist - www.youtube.com/MosquitoMods

View dlmckirdy's profile

dlmckirdy

195 posts in 1787 days


#7 posted 07-12-2012 05:55 PM

I’ve had the same problems with Kleen Strip mineral spirits. I think it has to do with their low/no volitile hydrocarbon formula. I went to my LOCAL paint supplier and bought traditional miner spirits and solved the problems. The owner of the store/paint company said he gets the same complaints about Kleen Strip regularly.

-- Doug, Bakersfield, CA - I measured twice, cut it twice, and it is still too short!

View Mainiac Matt 's profile

Mainiac Matt

3996 posts in 982 days


#8 posted 07-12-2012 06:03 PM

I think Doug is on the right train of thought….

“Odorless” mineral spirits can also be labeled “white” mineral spirits…. and I got a can a year ago that was just that…. white.

What Chris probably saw was a can that had been on the shelf a long time and whatever makes it white was settled down to the bottom.

I’m guessing that this stuff was tailored to artists and others who work with oil paints in doors and don’t like to stink up their studios with solvent smells.

Use that can to clean paint brushes and get some plain old, cheap and stinky “paint thinner”

+10 man points to Ed for not whimping out and asking for help (aka directions) untill after he botched the finish twice! Keep doin’ us proud brother :^)

-- Pine is fine, but Oak's no joke!

View BinghamtonEd's profile

BinghamtonEd

1336 posts in 1023 days


#9 posted 07-12-2012 06:09 PM

Lol thanks ssnvet. It’s my software engineering background coming into play ” “Huh, didn’t work? OK, try it again. Still no. OK, try it again. Still not working? ...”

-- - The mightiest oak in the forest is just a little nut that held its ground.

View EPJartisan's profile

EPJartisan

1056 posts in 1779 days


#10 posted 07-17-2012 01:54 AM

Have you tried naptha? Mineral Spirits just has too much junk in it for me.. I only use it as a cleaner. Naptha mixes really well with Poly.

-- " 'Truth' is like a beautiful flower, unique to each plant and to the season it blossoms ... 'Fact' is the root and leaf, allowing the plant grow and bloom again."

View Ktrumble's profile

Ktrumble

17 posts in 565 days


#11 posted 03-02-2013 12:50 PM

I think I am having the same problem. Did it look like this? Did you end up stripping it or applying 100% poly?

View camps764's profile

camps764

794 posts in 1013 days


#12 posted 03-02-2013 01:59 PM

yikes! That looks like a gorgeous piece Ktrumble – except that nasty spot.

Glad I read this thread…will keep using the stinky stuff.

I actually don’t mind the smell of mineral spirits – sort of like when i was a kid I loved the smell of gasoline…

which might explain some things about me I suppose.

-- Steve. Visit my website http://www.campbellwoodworking.com

View Ktrumble's profile

Ktrumble

17 posts in 565 days


#13 posted 03-02-2013 02:12 PM

I too used the non stink min spirits. I also still like the smell of gasoline.

View Ktrumble's profile

Ktrumble

17 posts in 565 days


#14 posted 03-02-2013 02:16 PM

Here is the rest of the table. I also learned that you really need to wait until Danish oil dries before applying poly. I had a ton of bubbling. We also had a lot of rain, so clearcoat took 3-4 days to dry. I hate finishing, but I can’t be impatient now after all the work I put into the piece.

View Ktrumble's profile

Ktrumble

17 posts in 565 days


#15 posted 03-02-2013 02:20 PM

This one literally had blood, sweat, and tears in it. Stabbed myself with a chisel, causing three stitches. My wife didn’t understand why I stopped the bleeding, then immediately went back to the shop to scrub the blood off the table before going to the ER. I still can’t feel the end of my finger.

showing 1 through 15 of 28 replies

Have your say...

You must be signed in to reply.

DISCLAIMER: Any posts on LJ are posted by individuals acting in their own right and do not necessarily reflect the views of LJ. LJ will not be held liable for the actions of any user.

Latest Projects | Latest Blog Entries | Latest Forum Topics

HomeRefurbers.com

Latest Projects | Latest Blog Entries | Latest Forum Topics

GardenTenders.com :: gardening showcase