From my experience...no. You can try and mask the problem by having someone come out and detail it but damage is damage at the end of the day and once all the sealants have worn off it will still look poopy. With the abundance of body shops around in Perth I'm sure a quick visit to a few would end up with a quote that isn't too bad.

Painting the roof and bumper is not very demanding labour wise, I resprayed my old vl turbo however, I only used acrylic, not 2pak. It's not very difficult as long as you take your time and the prep is on point. Seeing as your car is getting quiet old now, I'd personally do it myself if money is an issue.