i love how he looks like he's smiling

Thank you :)

oy, Pretty good looking :) Good job

Thanks!

The nose and lips look a bit dry. Are there processes to make them more lifelike, retaining a wet kind of look?

It's a typical occurance for these ranch foxes as they were never intended for taxidermy mounts in the first place, they are just skins that you have to do the best you can with as they don't usually turn out the best results if they are not properly perpared for mounting.

So there are no post processing methods which could be used? I thought it was likely as some bodies are probable to be found in a poor condition, though they should still be preserved as well as they can be.

Well, when it comes to prepping a skin for taxidermy special measures are made when the animal is skinned, before it goes into the tan. The same measures aren't made for garment skins seeing as they are just going to be cut up for clothing items. And, once the animal tanned, there are some things you can't always back track, like how the animal was originally skinned and cared for prior to tanning. I'm able to make some adjustments to the skin, but it's never as effective as properly preparing it in the first place.