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BLO over paint??

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Forum topic by wdnick posted 12-09-2015 06:39 PM 542 views 0 times favorited 6 replies Add to Favorites Watch
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wdnick

6 posts in 437 days


12-09-2015 06:39 PM

I have a CNC machinist friend that has asked for some advise on wood. He’s machining a gift for his wife for Christmas. I end up donating him a chunk of beautiful mahogany that I had and suggested a BLO finish. Showed him a sample and he’s all for it. THEN, he throws me a stumper. There are some thin recesses in the piece that he wants to “fill with red paint and sand flush” prior to finishing. Now I’m thinking to myself that the BLO will cause the paint to bleed or worse smear when he wipes it on. I think an oil based paint if obvious out of the question, but would he be OK using something like an acrylic paint? Something else? A test piece is in his future, but if there’s a particular direction to go (or avoid) that would be helpful.

Thanks,
Doug


6 replies so far

View Fred Hargis's profile

Fred Hargis

3951 posts in 1961 days


#1 posted 12-09-2015 06:44 PM

I’m not sure I follow…if he paints the recesses and lets it dry, then sand, the BLO isn’t going to do anything to the paint. Well, maybe a heavy coat of BLO that’s allowed to sit on the wood can soak under the paint and loosen the bond….but it’s not a solvent, and I suspect that oil or acrylic paint will work. For the BLO I’d just apply a thin coat and wipe it off quickly. Can’t imagine it would cause the paint to bleed and smear.

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

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shampeon

1719 posts in 1651 days


#2 posted 12-09-2015 07:03 PM

First of all, paint isn’t a pore filler. If he wants to make the pores red, he should get some light colored wood filler and some TransTint dye. Do a seal coat of shellac so the dye doesn’t bleed into the wood, mix up the filler to the right color, fill the pores, then sand back. At that point he can use whatever finish he wants: BLO, shellac, lacquer, poly, etc.

-- ian | "You can't stop what's coming. It ain't all waiting on you. That's vanity."

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PineChopper

187 posts in 1664 days


#3 posted 12-09-2015 07:17 PM

How about a stain or dye in place of paint?

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wdnick

6 posts in 437 days


#4 posted 12-09-2015 07:20 PM

@Fred, Maybe I’m over thinking it. Just thought that putting oil over an oil paint might soften the oil. Like, I said, there’s a test piece coming though.

@Shampeon, The idea isn’t to use the paint as a pore filler, but to fill some machined in recesses with color. Think of it as a paint inlay. He’s not concerned about filling pores on this project as it’s a wall hanger.

View Fred Hargis's profile

Fred Hargis

3951 posts in 1961 days


#5 posted 12-09-2015 08:49 PM

If the paint is dry, BLO isn’t going to do anything to it.

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

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shampeon

1719 posts in 1651 days


#6 posted 12-09-2015 10:32 PM

Yeah, I wouldn’t worry about it then. It might slightly yellow the tint of the recessed, painted areas, but the technique with BLO is to apply it, let it soak in for a bit, then remove the excess. Just make sure to get most of it out of the recesses. And lay out the rags flat to completely dry before disposing. Setting everything on fire is not the objective.

-- ian | "You can't stop what's coming. It ain't all waiting on you. That's vanity."

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