Painting Kitchen Cabinet Hinges

I have an issue. I stripped and sanded (and I did not skimp on the process of either of those) to get some ridiculous paint (6 coats) off of a wood top. The wood is in great shape, but I noticed that some places had a "pink" glow to it (pink was the layer of paint that was directly on the wood). I sanded and sanded and sanded and the spots that had this "glow" did not get smaller or lighter. I stained the entire piece or wood and all of it took the stain, however, the pinkish glow is showing through a bit. I used a dark stain, so it kind of looks like I took baby powder and rubbed it on a few places. I'm assuming now, that the wood absorbed the paint that was originally used. If so, there is no telling how deep this paint is, and I would rather not sand layers and layers off, potentially harming the wood, just to see if I can get it to go away. Is there anything out there that can be used to "extract" paint from wood? I haven't been able to find anything. If this is not an option, I will leave it as it is. It's not ugly - but it doesn't look as crisp and clean as a newly finished project should.

Entering the final stretch of my basement finish. We had the drywall finished and sanded professionally. I cleaned every inch of the walls before applying primer (vac and damp cloth). My wife bought some 2 in 1 paint/primer and that caused me to pause. I went back and got 3 gallons of the drywall primer/sealer and explained why I thought we should use it. It's applied now and I have a concern. I can clearly see the mudded joints contrasting with the bare drywall. When I run my hands across the joints the difference is less obvious. I would say it all has a similar "texture" but the visual is more striking. We did not tint the primer so it's bright white--according to the primer coverage we did not put it on light. My understanding is that the primer/sealer we used is to provide a more even surface for the paint to adhere to. We will be covering with at least two coats of light grey (eggshell) 2 in 1 paint and primer. Should I be concerned about still being able to clearly see those joints through the primer? I haven't been able to find much discussion about this aspect of the painting process. Thanks!