I typically wet sand with tung oil but because of the open pore nature of this burl I decided against it. I simply applied Lee Valley tung oil like I usually do, let it sit, then remove excess. I've noticed these shiny spots which I sanded away with 400, then 600 grit abrenet. On the last application I wiped it clean, then blew out with compressed air and wiped clean only to find these circles. Can anyone tell me what's going on and how to avoid it? Thank you.cherry burl.jpg