caseyn5.
The Tamiya putty is a bit rough for figures, I prefer to use the Gunze one and there usually the pre-thinned putty in the Bottle.
I also use the 2 local putties "Mori-Mori" for mecha and scultping parts or "Sube-Sube" for figure Kits, I buy them in the 1kg tins and they last a loooong time.
Sube Sube dries to a ceramic smooth finish, Mori Mori is a bit rougher but will do the job.
BTW, you can thin both the Tamia or the Gunze putties.
Haven't tried Milliput (to expensive for my liking) but it is widely used by the pros.