What will Happen?
 

As above what will happen if I change the skin of a boat to a rusty one.this is for the GW guys as much as I love the gameI love rust buckets and the VIIB/or the IXC look like they came out of a paint shop will this change as the years go on? or do I have to get other skins for rust buckets?(by rust buckets I mean weathered if nobody knows)

There are some textures out there. If you use forum search you can probably find them. Im not sure who makes the best rusty textures.
If you are using the mod enabler, then its simply a case of replacing the ones used by the GW mod. Which shouldnt cause any problems.