These are bodies that have had time to begin decomposing. They swell with putrefaction gasses. They change colour and texture exhibiting “marbling’ where the bacteria laden decomposing blood in the veins changes colour and becomes more visible on the surface. The bodies may exhibit skin slip, this is where the top layers of skin begin to detach and slide off. They may also leak purge fluid from all orifices.
They can be made up with IPA or Grease based make up to your own requirements.
However they must not be made up / painted with Pax Paint as this will damage the dummy and incur a re-make cost.