I have my RM005 FM Titan done in HK .. which cost around US 800 for case refinishing !
Since that is a Sand Blast Case.... which I was told a bit more expensive than the normal one......
But this price is a few years back..... don't know how much does it cost now ...
Hope can help u
AC 
may be u can see there is a scratch from 11 to 1 position.... but after the refinish, it just looks like new
RM really done a good job !