I redid our kitchen counters about six months ago by just going over the
old stuff. I was lucky in that the front edge was not rounded over but
was a piece of oak with a beveled top edge.

I looked on formica.com and also on the hgtv web page and read a bit and
then proceeded by rough sanding and cleaning the old top and then gluing
as normal. The extra formica edge does not even show.

Saved hundreds over buying a new top.

Give it a go.

RonT