This is an accurate replication of a Henschel boiler for a steam tram. It's a 1:87 model copy of the Gooische Stoomtram no 18.
Frosted Ultra Detail is the perfect material for this. No need to go to the "Extreme", as it comes out very nice already.
For more info on the prototype or for kits or complete builds of steam trams in 1:87 scale, go to
Tramfabriek.nl.