are your exhaust tips black or grey?

mine are black

even after a good wash they return to black quite quickly and if I put my finger inside I get this black dust dirt like the inside of a chimney

I wonder if it's a commonality on these cars, or it's just mine

my previous car (ibiza cupra) always had grey exhaust tips with little deposits
 
Mine are black and even after a good clean they dont take long to go back.

But my brothers saxo is the same.
 
depends if youve got it de-catted my mates st170 has just been de-catted and he was saying last night since hes done that his exhaust is permantly black even after cleaning it black again after 5mins lol