I've used Masa and it works great. But I now mainly use fixed-out barya paper (Ilford FB seems to work best, but most any brand of fb paper can work too). Fixed-out Baryta paper works well for Van Dyke prints. In fact, I recommend starting with VDB solutions to learn the tricks of coating baryta paper before moving on to plat/palladium on the same paper. It is much, much cheaper and a bit easier to do and, to be honest, a well done VDB print on fixed out baryta looks almost exactly the same as a pt/pd print.