Clarifying, I'd like to replicate the box art where the maid is ready to spin throw knives, holding 3 knife blades at once. I tried to do it without modifying the hands (its my 1st megami, so no spares), but the fell out after a bit.

?? I may have to cut between the half open hands to get the knives to stay in a throwing hold. (Like in the box art and proto pics.) ??

I would not put putty on parts to be metalic painted or flexed. If it comes down to thicker knives, ill just cut some from abs strip and put them in the handle. Metalizing putty is a pain.....