Clear Waxoyling underside of E46 M3

[roygarth]

Has anyone done this?

Are there any nooks and crannies particular to this model that need special attention?

Thanks!

[joema]

If you're going under your car its probably a btter use of time to look for cracks in the existing stone chip protection and just apply/treat that area.

[Billy_Whizzzz]

I think it would be a really good idea to rust protect your E46. I've done various other cars of mine - and in terms of underside, i'd protect the bits you can see or get to - but remember that most cars rust from the inside out - so inside box sections such as sills etc are important - and with an E46 worth doing inside the arches and cavities, and inside doors and maybe scuttle. I used to be a huge fan of Waxoyl but having just had one of my cars treated with Dinitrol, I'm now a big convert to that as it seems not to attract as much dirt through not being so sticky, and generally seems more robust. There's a thin version for inside doors etc that really seeps into cracks, and a thicker one for high impact areas (and underside). I'd recommend that

[helix402]

Waxoil isn't very good, try Bilt Hamber products or Dinitrol.

[roygarth]

Thanks all….

[JD2329]

I had my E38 treated with Dinitrol a couple of years ago. From the reviews I'd read it seemed to have the edge over Waxoyl, though plenty of people use that too and I'm sure it's up to the job.
The Dinitrol website has a list of approved garages who can do the job for you and also has a lot of useful information about the different types of wax that should be used in certain areas.

An approved garage will steam clean it, scrape off any crud and apply the wax to the underside, crevices and door bottoms. You couldn't hope to do an equivalent job yourself.

Despite being 16 years old and living outside, the car hasn't got a spot of rust on it anywhere...it's a few hundred quid to get the job done but well worth it in my opinion.