At Rusty Squid, Rosie said that trimming and filling latex is a really important thing and that Aardman spend a lot of time perfecting what comes out of the moulds.
I've been trimming a latex cast to neaten it and remove the flash and any lumps of latex on the surface of the cast. Where there are holes i need to fill it with latex filler (can't remember proper name).
The scalpel blades become blunt really quickly, which makes cutting more difficult and you can't get a clean cut. Its frustrating, especially when you don't want to use up loads of blades.
|Its not the best image, but you can make out the lines by the elbow and shoulder.|
They also used 3-D printing to make replacement mouths. I think this works really well for the style of Aardman mouths. The smoothness the replacements shapes gave, made the characters really expressive.