I'm in the process of finishing an entertainment center which i stained with general finishes dark
brown water based dye. the finish is oil based poly that i am wiping on. I noticed that as I was applying the poly the rag I was using was becoming brown. after several coats I could see that some spots were considerably lighter than when I started. Could someone explain what happened.I'm guessing I should have put a coat of shellac before I started putting on the poly, but I have used the same stain on another project with no problems