replacing ruined SMT solder pads
You might try using copper foil tape that has a conductive adhesive, like 3M type 1181. It's usually used for EMI shielding, but can be used for making quick and crude hobbyist PC boards or for repairs. Copper tape is widely available, the main obstacles for repair use are probably minimum qty. and minimum width. A quick check showed standard width's down to 1/4", which you could trim to size with a sharp X-acto knife. I've seen tape like this in 1/16" and 1/32" sizes as well somewhere, don't forget to tin it with solder before trying to put down SMT devices. Applying a little solder to the trace and then dragging a piece of solder-wick across the trace with the tip of your soldering iron will leave a thin coat of solder on the copper.