Something a little different, this is a Euro car that I did an underbody resto on about ten years ago... I took the photo earlier this year so it shows as driven about 50K miles This is Wurth SKS which is a product that can be left as sprayed or painted within a 48 hour window... This obviously was painted.... It's the same coating you'll see in the wheel wells of vintage Porsches... It looks good, it protects, it deadens noise & it hides minor imperfections that would stand out on a straight painted under carriage...