Hi,
I'm new to the site, just bought a Mk5 GTi in red and was wondering which is the best polish to get her gleaming !!
In terms of polish (a product with cut in it but zero protection) are you wanting to use a machine or work by hand? If you have a portercable or megs G220 DA polisher then try the menzerna finishing polishes to bring life back to the paint.
If your working by hand I still say you cant go far wrong with good old autoglym super resin polish. It actually has a small amount of protection in it too so a good all in one polish / cleaner and sealant although on its own it will only last 2-4 weeks outside.
To top off which ever polish / cleaner you decide on I'd recommend either anything from the dodo juice rance or blackfire AFPP sealant. The blackfire especially works really well ontop of the super resin polish.