Thanks again for the kind suggestions, decided to use the white spirits and it did make the job a little easier.
Must admit I made mistakes, 1.. Left it on too long
2. used a cheap masking tape (very sticky) 3. Doubled it up
and 4. Allowed too much paint to cover the tape
.
When you consider I had 2 @ 16 foot lengths to remove without damaging the paintwork, I had my work cut out
You live and learn