Howdy edson,
First, welcome to the site! Now, as to your query about "battle damage". My suggestion to you would be to try a more
specific question. Meaning, an 88mm hit to the side sponson armour of a Sherman M4A3, or .50 caliber hits to the stand-off armour of a StugIII, or road mine damage to the tracks of an M113.
I don't mean to be 'A' type about it, but each instance has it's
specific techniques (at least for me

).
Tread.
BTW, KingTigers suggestions are all good ones!