Cotter Pin Crank conversion?

I have 2 cotter pin style bbs and 1 cotter pin crankset I have no intention of using. Kat something from on here took 2 halfs(a drive and a non drive side from one and the other) as the other 2 are rather stuck. If you have the tools+time to get them out then they are yours. I'm only planning to use one of the frames which is currently half way sanded for painting. Have said once I take time to get the other crank arms off will pass them to Kat but I'm sure she won't mind you having the other if she has a set still.

Yeah that would be great thanks! Would it be extremely difficult to get them out?