AT LAST. My order for Solvaset has arrived (ordered in September!) I have only tried some on my test bike (an airfix 1:12 bike) and Solvaset worked like a dream. Once again Boba Fett many many thanks for the information, I can now start applying this carbon fibre.
I'll still use my other decal solution, but when all else fails I will be using Solvaset.
The other solutions I have tried are:
Micro sol & set (a long time favourite and worked on most decals I have used)
Revell decal soft
Humbrol decalfix