sdelk

I am so glad I found this thread. I have an 1880's home that has some shiplap but mostly poplar was ran horizontally. I started taking it off the walls running it through the planer and edger and putting it back on the walls but that is a tremendous amount of work and no matter how careful I am the boards are breaking. I mean they are over 100 years old. So, i decided to paint...well the tannin in the wood are still coming through and the latex primer and paint i am using is not working. 2 coats primer and 2 coats of pain later still seeing dark spots come through. Is there a primer/sealer for very old wood like this that I can paint the walls or do i just take out the gazillion tack nails from cheesecloth wallpaper and start sanding by hand....i am stuck