I was wondering what's the best way to approach these, using touch-up paint, Quixx , or other.

Ones on the back bumper are numrous in one spotI think caused by rubbing plastic trash can in garage against it. They appear white and thin.

2 single ones on front bumper I did yesterday by bumping something in garage again[:@], however these show black underneath and are wider.
Thanks

 

here is the rule of thumb, if you can see the primer us a touch up pen then use the quixx (so the quixx is only for everything over the primer even the last layer of paint) hope this helps at all

 

ok yea thanks.

 

primer is white?

 

yeah ish, or grayish