Hi Brian
I hope you don't use your car as an everyday driver as you will need to strip a lot off the underside of the car to do this but here goes;
1 bottle of Jenolite or similar (I don't use it as intended but it indicates area of rot still present when ground back to bare metal).
a half litre of two pack etch primer + special etch primer thinners.
Small tin of grey or white primer.
half litre of cellulose gloss (your car colour)
Perhaps 2 litres of cellulose thinners
4 litres of schutz gun applied stonechip by Indasa
5 litres of schutz gun applied underseal by Tetrosyl
2 smallish tubes of joint sealer (the sort that can be painted over)
5 litre of Finegans waxoil (This went in internal areas such as doors, sills, inside of rear wings and chassis rails)
The car now weighs 2 tonnes but will last a bit longer
.
Good luck with it Brian.
Barry