Hi There Wiz, Well the question of different types of MDF also went through my mind when i started using a router by hand, in the end it came down to Feed rate, spindle speed, Type and quality of cutter.

Im sure there are better and worse brands of MDF but for me the local DIY is the usual supplier, and to be fair im not sure they wouldnt think i was a marsian if i asked them who was the supplier or what was the brand..

Experiment i suppose is the order of the day and if you cant get a consistantly acceptable finish then perhaps buy from another DIY... give it a go it will be fun, innexpensive and you can let us all know your findings..

Rick