The roll of aluminium foil I've got came from a local craft shop and is approx. 0.1mm, which is a similar thickness to the foil used for pie dishes, etc.
The width of the workpiece can also be an issue. I ran into problems when I tried to corrugate 0.25mm brass shim, which is definitely beyond the limit. It took multiple passes with an anneal after each pass through the rolls to get even corrugations across the strip, which was about 110mm wide. A test piece about 50mm wide worked OK, which lulled me into a false sense of security......
Graeme