Removing violet indicator dye from canister

[Noctilux]

Hydrochloric did the job. Most of it is now removed. But took an hour rubbing...

So, I have some sofnolime with violet dye available, and will follow @JohnnyC's advice

 

[happy-diver]

Now mate, where did you see this rubbing, there is no rubbing, there is just applying
perhaps some soaking and then some brushing or wiping and then just some rinsing
but no rubbing

 

[BenjaminF]

Now mate, where did you see this rubbing, there is no rubbing, there is just applying
perhaps some soaking and then some brushing or wiping and then just some rinsing
but no rubbing

The 15 year old in the back of my head is sniggering over that one...

 

[happy-diver]

Dude, if that's where you're at, I am staying immature forever
save I become one of those permanently stiff unsmiling types