Any easy way to strip paint of p5’s?

Main Train Horns
1

My p5’s havevteh standard blue paint on them is there a easy way to get the paint off?

2

Are they sand cast aluminium? Regular spray on paint remover works but you’ll need to keep an eye on it.

These were painted black over white, and took a few attempts:

-Kris

3

Found a Valor blaster that does a lot of work on old bikes (finned heads ect) will give him a crack.