Brandis. Alas on this aspect of the marque I am completely at a loss. Time for those with a finer grasp on the ethos of true perfection to take the stand.
I'm fine with oil, grease, bent metal and the usual rough stuff. Final finish is expensive, so I just don't bother.
For those other UK members of a like mind, (you know, the Hammerite Direct to Rust Brigade) I've switched to Granville Smooth Metal Paint. This is white spirit based, with a slower flash off time than Smoothrite. It covers well and brushes clean up far easier than the Xylene based brand leader that we have used for years. Smooth black on a frame looks like a powder coated finish. Works well on vehicle underframe, chassis and suspension parts.
Swarfy.
Additional. Nulon brand in the UK appears on hand lotion. PC factions would not allow a product to be marketed as "Start Yer Bastard" here, even tho' that's what we think with that reluctant mower, outboard or bike.