Okay, use sand paper or a sanding sponge with a very large grit to get past the gummy stuff. It will clog the paper quickly requiring cleaning or fresh paper changes, which is why I said to scrape. When you get the gunk off, use a finer grade of paper.
Or, use a drawknife or other blade, pulling it towards you. That shouldn't splinter, but be very careful you don't cut yourself.
