Quick update, thank you all for the comments and guidance.
Awaiting delivery of the Jet Seal and looking forward to giving it a go.
Got the fiancee's car to practice with the DA
After a good wash and and decon on select panels I gave a few panels a go with a blue pad and Chemical Guys VSS. Having watched a fair few tutorials on youtube I found it very easy and I am impressed with the results. I just took my time. To be fair her old car hasn't been polished in about 10 years having a lot of deep scratches and I wasn't going to jump in with a heavy cutting pad and and compound but just wanted to see what results I could get with a 1-step approach.
It was the prep that took more time than I had bargained for! That said I am now a firm convert to Bilt Hamber and used the following;
BH Auto-Foam - Wow shifts dirt!
BH Auto-Wash - 8ml in a 5 gallon bucket, great stuff and no residue
BH Auto-Wheel - First time I have used a this type of product. I didn't need much at all to turn the whole wheel purple! Used with a set of Wheel Whoolies it made light work of the alloys.
BH Korrosol - Fallout remover, more purple goodness for the bodywork!
BH Medium Clay - Great value and amazed at how easy it made moving tar.
BH Cleanser Fluid - Post polish and pre wax/sealant cleaner
BH Double Speed Wax - Goes on easy and buffs off easy. Looking forward to seeing how durable it is.
Looking forward to doing the rest of the car over the weekend.
I have a few more pads and some Menzerna polish/compounds on order for future projects but for now I think I am set in the right direction