MUMG in 2016, when I bought the The Thing I assembled him pretty quickly in readiness for possible painting. My thinking was that with a simple colour scheme, he would be quite quick to do despite his large surface area (he is 65mm from the bottom of his base to the top of his head!). Then I found myself focusing on other stuff.
When I decided it was time to tackle the mini, the painting stages were: an orange-brown base layer; Devlan Mud wash (with some extra spot washes of AP Soft Tone); dry-brush the same brown; dry brush a lighter brown; then pick out top edges of 'rocks' with successively lighter highlights (4 passes on the highlights).
Finishing The Thing gives me 17 Levels of Superhuman Heroes (with Black Widow and Black Panther), or 16 Levels of Cosmic Heroes (with Groot). I am most likely to play an Avengers style team I think so will be mostly adding to the Superhumans as things progress next year.
MUMG Painting Summary
MUMG characters owned: 24
Percentage of owned characters painted: 16.7% (4 models)