Can I replace the inner case of my Evo?

its possible to change it if you can get the case. Id imagine you can purchase one online somewhere. To change it all you would have to do is take the battery out and unscrew all the screws that holds the case together. Make sure to know where all the screws came from. Also be very careful when taking the case off as there should be some type of tape or something that hooks from the inside to the case to see if it has been tampered with(a lot of electronics have something like this). There is a guide on here that you can follow to take apart the evo. If the scratches are small i would suggest to just leave them as its no really gonna matter in the long run.