Drive the car back to the road they did and do the diesel spraying there they would then get called back when their job has been found to be tripe

Serisouly though cat litter is best and cheapest but only ontop of some old new papers to ensure that if a flow of diesel gets between the bits the paper catches it and the kitty litter can then pull it from the paper  FFRR MY06 facelift With TDV8 Alloys Zeros/ATR's
Mantec Sump Guard, Rigid Load liner, MY10 BT upgrade.

made a start on it and found the diesel wasnt to good but WD40 was way better, have cleaned it all off the paintwork on the rear quater but not the inner arches yet as that looks like a right mission to sort. thinking maybe use an abrasive pad of some kind along with the WD40 to speed things up on the plastic arches ?

I'd still be inclined to spray the wheel arches with white spirit, just spray them every hour until the tar is really soft, almost liquid like, then take a paint brush to it. Most of it will come off very easily. Might be easier with the wheel off for final cleaning.
WD40 will do the same job, it's just you will need a lot.

Go the pound shop and buy a pack of those dish wash sponges with the slightly rougher side on them. Should be safe on bodywork and such if you don't push to hard with them.

Personally I'd use loads of kitchen roll as it's less likely to smear it over the place and can just go in the paper recycling bin afterwards or the bonfire 👍 FFRR MY06 facelift With TDV8 Alloys Zeros/ATR's
Mantec Sump Guard, Rigid Load liner, MY10 BT upgrade.

Suggs wrote:

made a start on it and found the diesel wasnt to good but WD40 was way better, have cleaned it all off the paintwork on the rear quater but not the inner arches yet as that looks like a right mission to sort. thinking maybe use an abrasive pad of some kind along with the WD40 to speed things up on the plastic arches ?

I'd keep the WD40 away from plastic arches...  Visiting from DISCO3.CO.UK
Discovery 3 TDV6 Auto HSE Zambezi Silver

^ Why?

While it may not cause instant damage, over time, I believe it is likely to cause plastics to degrade/disintergrate. Petroleum based substances and plastics don't mix well. I guess it all depends on the exact compositions, but there are certainly reports of such effects about so I'd avoid to be on the safe side.  Visiting from DISCO3.CO.UK
Discovery 3 TDV6 Auto HSE Zambezi Silver

Been cleaning my wheel arches for years with WD 40, the cow s..t doesn't stick to it.
I find it hard to believe any plastic used in a vehicle, except maybe in the cabin, is liable to damage caused by oil based products.

^^ Wot he said, all external plastics will be oil proof, otherwise they would suffer from fuel spills  Yesterday I couldn't spell Engineer... Today I are one!
Inventor of the 'Guide-o-Matic automatic wheel alignment tool'
Former long term L322 owner, Up/Down graded to a Classic Tractor!

me thinks a few weeks of wet weather would wash any wd40/oil/etc off the plastics..... ... - .- -.




Y. O. L. O.
.

You're probably right, though I wouldn't trust LR to use fuel proof fuel lines.

The effects would always be varied, so might not be noticeable/matter - mainly, I've heard of it causing things to break when (re)moved later, rather than anything else, or issues with rubbers (i.e. non-PTFE).  Visiting from DISCO3.CO.UK
Discovery 3 TDV6 Auto HSE Zambezi Silver

Earlier in this thread there was a recommendation for Autosmart Tardis. This works!! No If's, But's or Maybe's. I've even used it to clean a hardened paintbrush which had been used to put on roofing bitumen and then not cleaned out. 1 hour soaking and the brush was like new.

Get the car on stands, remove the wheels and use a sprayer to apply it. Within 10 minutes it will be running off the arch liners. Then use a pressure washer to remove as much as will go. Repeat as necessary. Twice will be more than plenty for most situations although I appreciate yours has rather more soiling than average. It's also safe on plastics.

Use gloves or it will also remove all the oils from your skin.

Arnt the wheel arches around £25 each? Send Dan a message/enquiry and if so, simply replace them! Not worth this much hassle/finger nails/stress for £100 sir

that is another option i guess

Or you could just leave that bit for the valeter to do when he comes around  Yesterday I couldn't spell Engineer... Today I are one!
Inventor of the 'Guide-o-Matic automatic wheel alignment tool'
Former long term L322 owner, Up/Down graded to a Classic Tractor!