rust protection?..

whats the best thing to do to seal the underneath of the car to protect from rust... few tins of underseal or is there a more thorough method that can done?

You could get the whole lot stripped down, cleaned up and powder coated  

Mike.

sounds good to me.. would it be pricey and would underseal still be needed

You could but powdercoat chips off easily so not realy a good idea on an everyday car

EPOXY MASTIC

from RUST BUSTER.

lethal stuff - spray or brush on - hard as nails. two coats then your body colour coat then a couple of laquer and you'll have a floor to be proud of - get it on a jig and on its side and get the sealer off and any rust sorted out if your for keeping the car - come on hurry along