Formica all-in-one counter top and blacksplash Question
From what you describe I am not sure if you are talking about a postformed counter top. If you are, the radius you talk about would be out more than tile will cover. The backsplash should be about 3/4" thick no matter how you cut it. Formica is a dying method, but if you can find a supplier, or maybe on line, there used to be tools, somewhat like a utility knife, with a piece of carbide in the tip. It scores a knife like groove in the surface and the formica can snap like glass. The base material is usually particle board with a joint in the corner that we used to bend and snap it off after scored. Again this is a guess as I can't tell if you have a postformed from the description.