[sensible]

Got some white worm corrosion on a diamond cut wheel on my 2019 420i. Took the opportunity today, being warm to try a DIY repair. I had done a DIY repair before on the edge of the wheel which turned out well so thought I would give it a go. Not happy with the results, not a seemless blend with the diamond cut finish. 5 coats of lacquer so at least it's not going to corrode.

[Pentland]

Save your all the bother and get them powder coated.

Diamond cut alloys in the UK. ‘king stupid idea.

[Ennoch]

Originally Posted by sensible

Got some white worm corrosion on a diamond cut wheel on my 2019 420i. Took the opportunity today, being warm to try a DIY repair. I had done a DIY repair before on the edge of the wheel which turned out well so thought I would give it a go. Not happy with the results, not a seemless blend with the diamond cut finish. 5 coats of lacquer so at least it's not going to corrode.

That's not a bad job. Obviously it's not as good as a refurb but I reckon leaving the rest of the wheel untouched is probably better for overall longevity as I think the OEM finish is probably tougher than the average refurb job. It might not be 100% but from 5ft I'm sure it's fine, and how often are you or indeed anyone else looking at your wheels that closely?

[sensible]

Originally Posted by Pentland

Save your all the bother and get them powder coated.

Diamond cut alloys in the UK. ‘king stupid idea.

Yes I will when they are bad, but apart from that one they look perfect.

[sensible]

Originally Posted by Ennoch

That's not a bad job. Obviously it's not as good as a refurb but I reckon leaving the rest of the wheel untouched is probably better for overall longevity as I think the OEM finish is probably tougher than the average refurb job. It might not be 100% but from 5ft I'm sure it's fine, and how often are you or indeed anyone else looking at your wheels that closely?

Cheers....yes, didn't want a refurb as they tend not to last long.

[roundy]

I'd only ever have Diomand cut if I had the car from new for a max of 2 years and even then it probably has some defects.

Happy with mine since powder-coated though.

[evdok]

BMW would have replaced the wheel for free!!

[Benmac]

I suppose refurbs are in the "get what you pay for" camp. A decent one that costs should be fine if not better than new but diamond cutrting will always go eventually.

Not had it done to mine as there's only a hint of it in a couple of places so far but the powder coater chap I use for carious things including wheels has a technique which sort of recreates the diamond cut look. Basically he coats the wheels silver, then applies a darker powder over the top, carefully wipe off the darker powder from where you want the "diamond cut" then do the final baking.

[sensible]

Originally Posted by evdok

BMW would have replaced the wheel for free!!

If it was in warranty. Had from new but its an April 2019 car.

[evdok]

Doesn't matter, mine passed 3 years and because it was looked after by same dealer up to this day they replaced a rear wheel approx 1 year after warranty

[sensible]

Originally Posted by evdok

Doesn't matter, mine passed 3 years and because it was looked after by same dealer up to this day they replaced a rear wheel approx 1 year after warranty

I sid have one replaced on a 3 series that was 6 months out of warranty and had to pay £100 labour, but 18 months out of warranty would be pushing it a bit.

Anyway, it's done now, so I live with it or get a diamond cut refurb.

[TurboWeasel]

Good effort. If nothing else it will stop the worms from spreading until you get a pro job done on them. No one will even notice when it's covered in brake dust anyway.

But that is why I sold my 442Ms. Diamond cut looks lovely but with the mileage I do, I would be refurbishing them every 2 years.

[Wardy5]

Hope you've got some wax or some protection over the top. Plus your other wheels if you want to try and maintain the diamond cut finish for as long as possible.

I can't stand the finish personally, and get them powder coated whenever they start to go on cars I've owned. Whatever you do, they will always eventually get water under the surface, and the 'white worm' starts to appear...