I have had good results with a heated table knife and wet Bounty kitchen roll or a wet cloth, make sure it is 100% cotton.
I have found an iron set to max and used with a et cloth does the job just as well and without so much fuss if you are working in the hose rather than aworkshop. you really can steam out some bad dents and even gouges lift a lot, leaving less filler required shoulfd you need to use it.
I generally use sanding dust from the stock mixed with wood glue or Araldite- then just sand the repair flush, re-colour and finish. Be careful not to use sandings that have been over the silver oval - you will end up with a metallic finish!
