Dropped TBA last year, (Mulberry) small scratch front fender, purchased paint touch up/repair kit. How do I prep/clean the damaged area b4 painting? Use fine or what grade steel wool? What type of cleaning solution? A solvent, what type? Acetone? Plain old alcohol? Good old-fashioned soap and water? Afraid if I use too strong solvent could disfigure plastic fender. What are your suggestions or experience?