A have never heard of the pencil rubber trick? - sounds worth a try.
When I go back to have application number 3, I shall mention the discolouration - to me it signals carelessness, I may ask them if they mask off any areas..
Overall though, it's been well worthwhile - everytime I give the car a quick clean, it comes up so well. The swirl marks are ever so light and small too. It really does look excellent, just a few niggles..![Big grin :D :D](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
When I go back to have application number 3, I shall mention the discolouration - to me it signals carelessness, I may ask them if they mask off any areas..
Overall though, it's been well worthwhile - everytime I give the car a quick clean, it comes up so well. The swirl marks are ever so light and small too. It really does look excellent, just a few niggles..