I quickly painted a few of those figs up when experimenting with dipping a few years ago.
Apart from the first guy shown I used heads that came from the gangly Robogear infantry models and a bright scheme to make them ore suitable for use in pulp sci-fi, Space Ranger sort of games. I also added more sci-fi looking backpacks from somewhere. Pretty basic paint jobs and awful photos, but it shows the figures versatility I think.
I would have zero issue using them as Imperial Guard as supplied (that regiment have autoguns rather than lasguns).



FYI, The instructions originally supplied with the models stated that polystyrene cement should not be used to assemble the figures. Superglue was recommended. I dont think that the plastic is styrene, so it cant be melted properly by polystyrene cement.