just bought my first car,thermalyte vios, and may mga mantsa na yellowish sa baba ng door either langis ata or asphalt..and sadly may nakita pa kong yellowish mark din sa may area around the door of gas.i really don't know what it is kasi mataas yung location ng mantsa unlike yung sa ibaba ng door.iniisp ko baka natalsikan ng oil nung maulan na gamit ko kotse.

how do i remove those irritating yellowish stains? thank you so much!