>>281647474
I posted the timeslot last thread but it's episode 36 2:43 of zeta if you want to see what i mean by the hand.

for the lines they would trace the douga and draw the lines on top of the cel and paint the acrylic on the back of the cel.
https://www.youtube.com/shorts/tGFhNQ5eY4Y
like this but up and down for the hand.
here's another video https://www.youtube.com/watch?v=ElXRkfVBIp0