I didn't do anything special to the picture or the car. The picture was taken near Rocky Mountain National Park 2 weeks after I bought the car. It still had that 'showroom quality' look. The only other thing I can attribute the shine to is the fact that it had snowed in the morning before the bright sunshine came out. The interaction between light and moisture probably helped the luster as well.
Sorry I don't have any tips for you. I hope you are enjoying your Smart!
Welcome to the site, and the wonderful world of Smart Cars. This is a very good site with good information and nice people. When you get a chance join the Mass. & New England groups on this site. We do Smart Car Ralliies throughout New England once the winter breaks. We have a great NH turnout at our rallies. Well once again welcome, enjoy the site and Herbie.