Milliput is a two part putty that sets concrete hard, so can be drilled and sanded. You can actually mix it into greenstuff and procreate to make them set harder and let you carve and sand them. It's good stuff.
Unless it causes you severe skin irritation. Which may happen. Sucks for you. Buy gloves.
Milliput excels in filling hard minis (not Reaper Bones- it will crack).
Milliput dissolves in water, so a moist brush smooths it into cracks, and it is made up of fine particles, so it doesn't get that slight lip that greenstuff does when you use it as a filler. A few little balls rammed into the offending hole, a couple of smooth brush strokes and voila!
Milli-juicing is where you dissolves the putty into a thick milk, that can be brushed onto a model to fill surface imperfections. Once set, you can polish the mini with fine wet and dry paper to get a silky smooth finish.
It's great for fixing bad mold lines too.
Mix a ball, poke a hole in it, put a little water in it and stir with a cocktail stick until you get a paste. Dip in a brush you hate, because this will destroy it, and brush away!
Remember this will fill in details, so light brush loads, and a few coats is best.
Oh, I am converting this dude into the 90's cartoon version.
Millijuice is also a great glue for making a surface tacky so that thin greenstuff details can be added. Just skip the polishing bit.
Use this knowledge for evil, people.
Scott needs a bit more filing and polishing to rid him of his costume piping and then a polish to make his costume smooth and it's onto adding the hair and utility belts.