Ok there are Two choices

 

1: 3m clean and strip disc for your grinder { its a plastic paint sripping disc used By panel shops and wont damage the panel }

 

2: cam paint stripper { again used by panel shops but messy and you have to make sure you clean it good after or you will stuff ya paint job }

 

any good panel / bodyshop suppiers stock these the disk is around $25 & stripper for a 4 ltr is around $30 to $40

 

cheers

Thanks mate, much appreciated!