Golf 7.5R & Clio 200
Just the build up from the exhaust. Completely normal.
Perfectly normal, get a metal sealant on there after giving it a clean, it'll stay cleaner for longer.
I use a scourer pad ryan when mine starts to go a bit dull, wonder wheels is good aswell for getting it off
Cool, where's it getting done?
Scourer pad? your brave.