underbody surface rust correction

hi all i have begun my project on my TF and wangt the worst job out of the way and done properly
the underbody could do with some rust correction as its only surface rust
i have the front bumper, wings and rear bumper exhaust and heat shield off
and was wondering how much a body shop would charge to sort the rust and underseal the car ???
if not i will have to do it all

for piece of mind you are better having ago yourself.......as its all to easy to spray with a black wax with little work done...if its just surface rust ,you can use a simple wire wheel on a drill. followed by some waxoyl for protection....The bodyshop price will depend on how bad that underside is....a good set of ramps help for this type of work