I use to have my own automotive interior repair business. I had these rubber flexible patches, they were the size of your average bathroom wall tile--they had different grain patterns on them. That's what I used. When I made the suggestion I was thinking of very small minor scratches or scuffs, nothing deep. For the small scratches you want to use the lowest setting of the heat gun--don't hold it too close to the plastic panel, and just use the heat on it ever so lightly--you don't want to melt the panel. As you get practice you'll get a feel for it. I hope I explained it clearly. Sometimes I don't explain things very well.