TD-5240

I am just starting on getting my armor and everything. Have not got it yet but will be soon. I will be joining up real soon at the 501st once I get everything together. How dirty can you make your armor. For example could I put battle scars and injuries add a lot of dirt what? I am really trying to figure out which to go for TK or TD but don't know which to choose from. Which one should I choose, I kinda like having the battle scars and injuries and the fact of a trooper getting down and dirty. So what is the scoop.