zechs: ang salamin di talaga napopolish if you're after scratch removal. Masisira lang yung soft layer ng windshield.

crossback: depende po sa sidemirror, plastic coated mirrors should never be polished. Mga jap cars usually ok lang, but most euro and us cars have plastic coated mirrors that "bruises" if rubbed hard.

ghost: yes, of course. How old are your wiper blades btw?