I'm not sure how well it would work for printing slides, using something like the process I just mentioned, but it would be worth a try. Please, PLEASE, no back printing on such a paper for this reason. Come to think of it, I don't remember if what I have is back printed or not - I have some old prints from color negs and can check.

Panalure got a bad rep because the early versions were rather flat and didn't look that great. The final version was actually quite good, if you didn't mind RC glossy.