We used to shave Daisy (RIP), my sister's maltX. We did it ourselves because the only groomer in town had a bad rep.
We lived in hugley hot/humid temperatures though and her whole demeanor changed when she was clipped off. She got all bouncy and puppy-ish again.
When it was all grown out (sitting in a flower pot)
All clipped off, sorry not a good pic. But we always left her moustache, her tail and her ears on and only trimmed her eyebrows. It Suited her, she looks great./