Little Disappointed

Have also got T120, had it since 2019. You really do have to make sure no products get left or can run on the caseing. The scotchbrite method def works to get brushed effect.
With winter on way you MUST not leave any road salt on the cases ,it will eat into them and leave very bad pitting. Wash them off with a bucket and brush then dry when get home. Only takes seconds Unfortunately I know the hard way. Polished mine out but can still see pitting up close.
PS. Hi from East Devon.

 

Ceramic coat it once you are happy with your polishing? I got some off a fellow on here and its been great. Very much appeals to my OCD!

 

Had the same with my 2017 T100.

Found out after they'd sold out that Triumph did a replacement casing set in black for my model, probably down to grumpy customers. The price of the individual parts was mad so I left them as standard, but I hated putting the bike away for five months every autumn until the gritters were safely off the roads in spring

 

When i bought my T120 new in 2017, I had chrome engine covers fitted
on the first service, never looked back.

 

There is £bay, have seen them on there , but you have to be careful, some are rough.
The sellers have a cheek listing them.

 

There’s a lot to be said for the black coated engine cases and I like them on the Scramblers but I agree that some models do look more retro with the polished alloy finish. No matter what you try and protect them with, in the end it just comes down to a rigorous cleaning routine, especially in Winter. Even dry Winter days can leave your bike covered in salt dust.

 

Hi RB, I've used WD40 previously on my 2018 T120 engine casings to remove stains from Muc Off left on slightly too long & general grime that occurs from riding. I'm in a bit of a similar situation with the frame on my Tiger, it looks like whichever of the previous owners ride through something which has stained the frame with black marks on the chain side. Have used WD40 but it's not been very successful or more like taking an nextremely long time to make sany impression, so I'm going to try Isopropyl Alcohol 70%. It may work on the Bonneville engine casings but I don't know what metal they're made from. Going to attempt to find out & do some research on't t'internet. Let you know what I find in due course.