plasterers buckets x2 (soap and rinse) they are huge and only a fiver each
Wash mitts x2....one for top half and one for bottom half
DemonShine Muck-Off(orange bottle) good pre-wash and will do at least 4 least cars (halfords)
Clay bar kit (Meguairs?) loads of other brands of clay bars and mitts to choose
Kent drying towel....massive and always on special offer in homebase,
Quick detailer(Meguairs?) use with the drying towel for spot free finish
Autoglym Super Resin Polish
Autoglym HD Wax
Autoglym Extra Gloss Protection
Autoglym Glass and Plastic cleaner....not the best but does the job
Other products to consider, snowfoam lance, pressure washer, fallout removers, wheel cleaners, wheel sealent, glass sealent, machine polisher>>>>pads and polishes, detailing brushes, wheel brushes...the list is endless...almost.
OR pay someone to do it and then maintain it...but wheres the fun in that!