Taking care of vinyls

a few years ago, i had black vinyl stripes on my xtreme s10. they looked a little scuffed from age, weather, washing, etc. i polished them with a buffer as i was doing the whole truck. i was careful to not grab any edges with the buffer or get it too hot, and it came out great. they looked great until i traded it a couple years later. that was the only thing i ever did to the stripes