Yeah, there are trade offs between dry ice fog and "fog juice" fog (I've worked with both).  Dry ice fog hogs the ground and "fog juice" fog disperses much more like real fog.  However, "fog juice" leaves a residue (and isn't good to breath either) while dry ice fog(super cold carbon dioxide) doesn't leave a residue.

The chiller you mention is available commercially, but it isn't cheap.  Most touring musicals that use fog have such a chiller which is shop built while rock shows tend to purchase or rent the commercial version, but then roadies usually aren't much into any gear besides sound, lights and pyro.

There are a lot more interesting projects on the monster list.  Many have to do with animatronics and there are a lot of material techniques thatr are well explained.

Marty

I just looked at the link you posted, Shawn.  Interesting design!  Most of the units I've seen/worked with have a much larger cold container so that a larger volume of fog can be chilled at one time.  This makes it possible to apply a larger amount of fog on a set.  They look like a big cooler, some with a window air conditioner built in instead of using dry ice which is difficult to get on the road.  Some have an auxiliary fan, also with a much larger volume of air flow, to propel the fog on cue.

The one in the link would be excellent for a haunted house since it is more concealable.  It would probably be great for an enclosed area like a marionette stage or any enclosed scene.

Marty

draw back is it adds a fair amount of wieght to the puppet

It does, but if you do a few push-ups before perfoming, youre ok....Honestly though, how much heavier can it really be? I see no big difference if you latex just the head.

Thats true sonny either is heavy unless its foam latex like Piggy

sorry i have not been about my sister is haveing a baby so had to run my mum and dad up to where she lives thank you for all your replys its helped me alot

Just a quick trick to avoid brush marks if your applying latex to foam.

Use latex gloves that are tight and apply the latex with your hands. Use the middle part of your finger top (the part between the knuckles) to keep the latex finish smooth, or the butt of your palm. They both work good.