Yeah, that's pretty rough.
I've seen some vids where people coat their printed items in resin and sit it out in the sun to cure. It fills a lot of the roughness on the surface.
Tho they usually show using a brush, I tried it using a little spray bottle and found that it works but you can't put it on thick or it will fill detail. For a body tho it might be the ticket.
if you know someone with a 3D printer they will have some leftover resin that you may be able to get.