On things like this, I use a product called Not-now-next-year. Sometimes it works almost forever.
Doug was right about the sand paper the rougher the better. I have used 50 grit or 36 grit, but with those you have to be cautious that you don't put divots in your top. You need something rough for the adhesive to stick to. Is there a reason you can't just replace the whole top? Here in California I have a distributor who sells me the fabricated tops for twice what it costs me just to buy the laminate. It is not a fun job doing laminate work if you are not familiar with it. Replacing whole tops is much easier, especially if someone fabs them for you.Good Luck,Mike