SJ,
Welcome to GDC.
I had not heard of Pre-Lim. It is described as:
"A mildly abrasive creamy paste designed for non-scratch cleaning, stain removal and freshening of many surfaces, especially metals and enamels. Also used for ceramics, feathering repairs to china, air-brushed glazed surfaces. PRE-LIM produces a brilliant silky, smooth finish." It seems to be made by the same people
Ren Wax has no abrasives at all, just refined wax
Different products, I think.
Dave
