Challe
Does he have a paint reader? A kind of scanner that can identify the paint code and mix formula? Even years ago most paint mixing schemes had colour cards that could be used....there are paint experts on here that will answer your question for sure and they will be along soon.
Long time since I was in Jonkoping ;-)...I spent one week a month in Torslanda, Gothenburg for 14 years ;-)
Best wishes
Colin (Ex Volvo Cars)