There are pics ALL over the place here. Plus a few archived pictures of the original suits. Just use the search function and you should be able to find them and ALL KIND of different ways to dent your armor up and paint it as accurately as you want.
As for image posting, you can scroll down on the posting page and use the "attach files" section. Also the insert image button takes a hyperlink to your image if you have it online already. Just put your link between the tags. You can display images "inline" that way.
Good luck!!! Lets see your armor as it progresses!