buffing/scratch removing techniques?

[willett]

hey guys.

i have a never truck (blue oval) and i have accumulated a few tree scratches over the last couple years from driving down narrow dirt roads.
most of them are pretty long, end to end or length of the box etc...
and i am hoping to try my hand at buffing them out.

we have a buffer here at home, but neither my dad or I have any experience with it.

what are some brands of rubbing compund that i should look for?

what sort of prep is necessary?

is there anything that i should be putting on after i buff?

is it right (or wrong) to spend some time and buff the whole truck? (the roof is pretty scratched up too)

thanks in advance,

Spencer