I've always had good luck using a heat gun when smoothing out polyurethane bumpers. Take it slow and don't get it so hot that it burns the paint. I wouldn't say it's hard to do but you should have some practice before attempting to fix a car you care about
I purchased a full kit with hammer tap down glue gun & puller. It works well but i was never able to get it perfect (Lacking skill). I'd recommend getting familiar with the tools and practicing on a beater before attempting on a Porsche. I have a few dents on my 986 i'd like to remove but will go with a pro pdr specialist this time. I'd like to do it myself but bodywork has never been my forte.