All comes down to the person buying it if/when u come to sell it mate.
I know if i saw a mint specc'd 3door cossie thats up for say 7k but had a reshell and one with fuck all done to it i'd go for the reshelled one if i knew it was all done properly!! and think alot of people would too

Wont make it drive any worse just cos its been re-shelled and i'm sure theres loads out there that have been already!