I made this effect trying to copy the one from the Hokuto no Ken figure, I was inspired by a photo I saw on Instagram of someone using that effect on several figures, I made it to use it on Goku from Sh Figuarts but I think it could be used on any other figure on the same line.

If you have problems with the fit, try printing again but varying the size a little. I printed several attempts in resin and fdm, varying the size very little.