>>/868252/
I used to get good results just dimpling, instead of making the alterations the feature of the model they were kind of wear and tear marks.
I also used a kind of dry brushing to give a really matte finish, so if your purple armour is embellished with gold, you might want a matte finish on the purple. It took me a long time to learn that the finish isn't dictated by the material, wood might want a gloss finish because wood is often oiled, even if it's oak, aluminium is very light in colour but wants a matte finish most of the time.