E.M.
I am not sure about a wilton cake liner, but the generic ones seem to do pretty well. sometimes, if you double line stuff- like put a paper liner over the foil liner or put a cheap-o paper liner over the pretty liner, it will work. But also when baking, remember that the liners absorb the oil and stuff, so they will get that look to them, too. Try using a wax coated liner or a double lined cup cake.
Hope this helps.
-E. M