>>5837182I use two Small Shop tools, the first being a standard hold and fold thing, which works for a lot of straight up folding of long and short pieces.
Then there's this curved folding tool with two sides, one that has multiple sized aluminum rollers for creating rounded details from straight pieces, and the other side has this rubber mat that you can create rolls by using the dowel and rolling the piece over it. I also use Tamiya flat bending tweezers for some smaller parts, as well as regular angled and pointed tweezers.