You're dumb if u think a coating will solve the problem. What happens when the coating gets worn down... ever thought about that genius?
A coating isn't a solution but that doesn't mean there isn't one. I read some article by an antenna engineer and his idea was to add more sections, so instead of one main antenna there are 2 or more. Then if one is bridged the phone simply switches to the other. In essence you allow the new phone to always work like the iPhone 4 does in the right hand.