Hmm... zymol it is the best care care in the world without a doubt; I miss my time as the European training manger for them and Paul has taken himself to a good level but personally I'd rate Dave Bowerman (sponsor on the other site) as a the best detailler I know. He was my best student and I know he uses a mixture of products now he couldn't be more knowlegable or professional.
In my time there and since I'd never use an electric mop I'd remove the marks by hand.
I finally have my own sports car and just need to find the time to do it justice. At the moment it just has a 'holding coat' on it to see it through the present conditions... Maybee I'll find a few days over Christmas?
P.S. as to only 2 pots of that one in the UK... I personally delivered and detailled cars for 3 owners (they got a full free detail with the purchase!) and I know of another 4 that had them after my time but it is good theatre!