Aye Martin,
If you need some paint stripper, I can recommend 'S.A.S. 5 Gasket and Paint Remover'. Spray can, that comes out foaming and lifts Honda/Yamaha powder coating, along with areas "touched up" with Hammerite and red lead primer/undercoat. So far it has been undefeated, when applied as instructed on the can and saves a lot of elbow grease, blasting costs. All parts need to be washed, with a good cleaner and then rinsed thoroughly, before re-finishing.
As for E5, it's the ethanol, a very good paint stripper and E10 is even better, but neither tackle powder coating, insofar as I have found.
Good health, Bill