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Mineral oil dissolves lacquer?

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Forum topic by mahdee posted 09-06-2017 02:04 AM 418 views 0 times favorited 9 replies Add to Favorites Watch
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mahdee

3816 posts in 1551 days


09-06-2017 02:04 AM

Topic tags/keywords: question cherry

Hi all,
Had a weird experience yesterday. Put some rubber hose that had been dipped in mineral oil on a table that I think I had finished over a year ago with lacquer. Next thing I know the rubber hose had melted the finish and left the hose impression on it. Tried some rubbing alcohol to wipe it off and it too ate the finish. This is very puzzling to me since I didn’t think lacquer was so susceptible to alcohol and especially mineral oil. The only think I can think of is that I sprayed DEFT brush on this table. I also used some rubbing alcohol to remove a small stain on a walking stick and the same thing. It totally dulled it up. Currently, I am using gemini pre-catalyzed lacquer and am hoping it doesn’t react the same way. Otherwise, I have to go back to slowwwwwwwwwww drying polyurethane. Any suggestions?
Thank you

-- earthartandfoods.com


9 replies so far

View Fred Hargis's profile

Fred Hargis

4649 posts in 2277 days


#1 posted 09-06-2017 10:49 AM

I’m not sure it was the mineral oil. Rubber and some plastic compounds have elasticizers in them to keep the products soft and flexible over time. These same chemicals will eat into finishes, and not just lacquer. I had a phone with cheap plastic pads on the bottom that left black marks on my night stand embedded into the finish. I had to cover them with masking tape.

-- Our village hasn't lost it's idiot, he was elected to congress.

View CharlesNeil's profile

CharlesNeil

2069 posts in 3654 days


#2 posted 09-06-2017 12:44 PM

Fred is dead on, many plactics will react with lacquers and other finish …As to the alcohol , Deft is nitrocellous , a weaker lacquer than a pre cat.. curious as to how long you had let it dry.

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mahdee

3816 posts in 1551 days


#3 posted 09-06-2017 01:37 PM

Thank you gus for the information. I was in a panic thinking I have to refinish several pieces of furniture. Charles, that table was finished over a year ago; maybe 18 months or so.

-- earthartandfoods.com

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CharlesNeil

2069 posts in 3654 days


#4 posted 09-06-2017 02:05 PM

the precat is more durable but still can respond to plastics, had a client who put plastic place mats on a table , from a factory .. I ended up scraping them off and re doing the entire top

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mahdee

3816 posts in 1551 days


#5 posted 09-06-2017 02:24 PM

So maybe I should switch back to poly and/or oils. I had a remote sitting on another project and noticed 4 round spots from the rubber “feet” on the remote. I went ahead and sanded it and give a coat of pre cat. The rubber doesn’t seem to bother it now.

-- earthartandfoods.com

View pintodeluxe's profile

pintodeluxe

5376 posts in 2597 days


#6 posted 09-06-2017 03:18 PM

I would vote for Pre-Cat lacquer over poly. Just my preference there, but I’ve had a lot of good luck with Magnalac, Valspar, and lately Rudd lacquer.

-- Willie, Washington "If You Choose Not To Decide, You Still Have Made a Choice" - Rush

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Rick_M

10291 posts in 2164 days


#7 posted 09-06-2017 03:49 PM

I’ve had rubbery plastic fishing lures that would melt plastic tackle box trays, but that hasn’t happened in a longtime.

-- http://thewoodknack.blogspot.com/

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mahdee

3816 posts in 1551 days


#8 posted 09-06-2017 04:59 PM

Thanks Willie… I have to check them out and see if I can buy them online at a reasonable price. I live in a small town and my choices are limited.
Rick, I used to have the same experience with the rubber worms and lures.

-- earthartandfoods.com

View Fred Hargis's profile

Fred Hargis

4649 posts in 2277 days


#9 posted 09-06-2017 05:35 PM

Lean those plastic night crawlers against one of your painted spinner bait heads and see what happens. I think the tackle box companies came up with a plastic formula that resists the solvents in the worms.

-- Our village hasn't lost it's idiot, he was elected to congress.

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