Painting Laminate Countertops?

I painted my laminate kitchen countertops using a Giani paint kit. They look fantastic, but I wanted more protection, plus a glossier look, than the poly top coat that came with the kit. I did apply two top coats of the Giani poly, and because I wanted them really glossy, I used Envirotex Lite, a 2 part hypoxy.

I'm guessing the reason they turned out all wavey on top, is because I did not sand off the Giani poly coat first. What a mess! Do I have to sand all the way down to the paint, or do I need to take the paint off too, and start over. Then what is a good, really glossy topcoat to use?

By Bkay