'grating' pumpkins?
 

It's a little early, but I plan on making a pumpkin wine based on Leo Zanelli's recipe. In it, he says to "grate the pumpkin flesh".

I have no idea how to grate the flesh.. Any tips?

Buy a food grater. The cheap ones are sheets of stainless steel with a bunch of sharp holes. Cut the flesh into chunks. Push back and forth over the grater (there's a right side and a wrong side). Slow, tedious and it's easy to grate your fingers. Get the coarsest one you can find, and watch your fingers!

Much easier to use a food processor, if you have one.