I do not 3D print, but i do have some basic knowledge of it? I am not a lawyer printer, YMMV.

I have heard that some materials can be smoothed over using acetone vapour; what about wiping the finished print to smooth over open pores on the surface of a print?

Alternately, since it’s not a flexible material what about applying something like 3M never wet?

Layers! My legs don’t.get.cold but i do keep my core body warm. Tshirt, flannel, vest, light jacket. Each layer is thin but every one adds something.

Boots. Ariat, wolverine, even the cheapest of rubber boots. They all feel a lot better with an insole and some nic e thock socks.

Gloves wise i wear cotton work gloves with rubber gloves over it. Hands sweat and get cold so i replace my gloves every 2 hours to make sure i can stay comfortable while working