Are there any chemicals to help strip Minwax Spar from a pine pic table?

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bent wrote:

OK you got me to giggle.     j4
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"bent" wrote:

Getting rid of an old finish is a total PITA job, IMHO.
My comment about a belt sander was to use it to "break" the finish so that chemical strippers would have an easier job of getting the task finished.
I was going to mention a 4", right angle, sander; I have spent a lot of time with one equipped with 24 grit discs.
Does a great job of cleaning and shaping; however, using it is an acquired skill.
Just like a belt sander, it can totally destroy a surface, if you are not careful.
Learn to use it on scrap.
Since you are this far along, my suggestion is to keep that file handy or buy a carbide paint scraper.
Have fun.
Lew
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I had a similar problem when I wanted to strip a table top of a botched job of Flecto Varathane. The mfgr wasn't very helpful ("Just sand it off", the say). I used a propane tourch with a flame spreader to soften the finish, then scraped it off with a gasket scraper (like a putty knife but thicker/stiffer). A heat gun would work too, but I don't have one. You have to be *very* careful and go slowly. Have a large wet towel handy in case you get things too hot. Go slowly and don't over heat. Mine was a fairly thick application and it came off in one layer.
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To remove black stains on wood due to water exposure, try oxalic acid. You can get this as deck brightener. Just look at the ingredients to be sure. Assuming the black stains are not due to mold, they are due to the reaction between the tannins in the wood and iron. Oxalic acid destroys the complex so the black disappears.
As for the finish strippers not working perfectly the first time, you have to keep at it. The bubbling suggests that they are working. No one ever said, expect perhaps for the stripper salespeople, that stripping a finish is easy and quick.
Good Luck.
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W/ a 60 grit I had I used the angle grinder in parallel back forth passes (about 16"), once confident I could go back and do another fill-in random board pass on the spots I missed. I haven't got to the final 1/3 sheet sander yet but there may be an issue of having a 468 sided board, but its definitely fastest/easiest to get it off, the AG is the way to go. After the AG the $5 Richard paint scraper is great for the little bits. Its best to get a leg on top of the board to hold it down while dragging the scraper. Creates a lot of shavings when sharp, critical. I saw a carbide (1) tipped scraper at Home Depot for $25. Dremel sanding cylinder great for the umbrella holes. Yet to find oxalic acid or to Cl.
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