Thank you gurdeep, I shall look into the textured products a little more then.
Ive had another closer look at the rear bumper this afternoon. I tried to apply a small amount of Meg's trim stuff and I could see it just wasn't having any effect at all.
The bumper top just felt really smooth like glass, It was as if there was a clear coating on it, and the product just wiped off.
I probably shouldn't have done this but I thought it couldn't look any worse, it's not going to win at the show n shine anyway, so I very gently rubbed the surface with some wet and dry to try and create a ' key' for a future application of a trim dressing.
I think it worked, it got rid of the glass like appearance and although not brilliant looks better now. I'll get some pics up in work tomorrow morning hopefully. With a bit of care I think it could look ok, it's certainly better than just leaving it I think.
I had heard if the textured spray stuff from when I had my Edition 1 about 6 years ago, as I wanted to have a corner fixed on my front bumper, so I would imagine more people know about it now!
From what I recall, the peanut butter, warm linseed oil, heat tricks work to restore the colour, not the texture.
A paint shop doing the textured effect is an option. Try the cheap and cheerful heat gun first. Fair enough you won't have the textured effect but you will have some colour and keep the original bumper.