I'll go look at a can. Don't want to make an issue out of this but when you say alloy it means a mixture of metals. It's man made and usually (nowadays) high aluminum content. Most small aircraft use very little to no titanium. They're mostly aluminum. Newer A/C are composite and aluminum used only where necessary (engine mounts, engine, etc). Then you've got a few other metals thrown in depending on function, brass, copper, nickel, etc.

 

Thats wot i meant Aluminium

 

Just scuff the paint!!!