no not much on a hard plastic grill wash good with soap and water use a red scotch pad wash/sand paint with any paint you want seal if needed. if you wanted to fill marks use a sanding primer and sand out with fine 400 wet or better . you need to watch going to coarse with sand paper or it can make the plastic fuzzy then it can be hard to get it to lay down . urethane and any rubber or plastic with a hi amount of flex have to be handle much different