I have noticed a small scratch to the back of one of my carbon fibre resin bucket seats in the cupra formentor VZ3. I have managed to polish out the scratch and it looks much better than it did, however; I'm now left with a shiny spot where the scratch used to be. Does anyone have any recommendations for restoring the shiny area back to the original matte finish that the carbon fibre resin has elsewhere on the seat? TIA