So just did my very first road trip in my new 2018 SCAB (now 1800 miles) through the CA Sierras. Somewhere along the way, they had just repainted the white road lines without giving any kind of warning. I didn’t notice it until getting home, but luckily the splatter was limited to the wheel wells and the running boards. I managed to scrape the white splatter off of the wheel wells, but haven’t been able to get it off the coarse metal of the boards. Anyone have experience in deep cleaning the running boards? Thanks in advance.