My boss has just had the road outside his house re-tarmacked. His car was approx 20 yards away from the road and it appears that since then when it was washed a nasty lot of dust like stuff is still sitting on the car.

You can sort of see it, and if you run your hand over it, it feels as though it hasn't been washed at all. Going at it with shampoo and a sponge didn't shift it at all.

Any ideas what the best stuff would be to get this off?

1000th post from me I think

By the way it's a 55 plate Renault Scenic in dark grey metallic - almost like the dolphin grey scoobies but a bit darker.

 

I'm new to all this but I've heard a good 'claying' session would be in order... well that's what I would attempt first. Maybe one of the pros will be along shortly with more experienced advice.

 

Pictures would be best, may want a light spray of Autosmart Tardis before claying?

 

The camera we have at work is useless and wont show that much detail and i'm not going home for a few weeks.

I think that stuff may be a bit harsh?

Any detailers in or around the Gatwick area?

 

What is the colour and consistency like?
Maybe it's tar deposit, Tardis would be a good start.
It could be fine dust from the rock aggregate which is a little more worrying as removal could leave scratches.
Were they council contractors? Maybe your boss can look at claiming off them to get it sorted!

 

I'd suggest this too. Hose the car down after washing, spray liberally with the tardis at whatever the mixture is recommended at, wait a couple mins, hose down again and clay like you've never clayed before using plenty of lubricant

 

If it is fine tar contamination then the combination of Tardis and then clay would be the way to go as suggested above, but if it's bonded cement dust or the like then an alternative approach may be needed, i.e. just clay, or in some cases, an acid-based contaminant remover and then clay. If you can, try hard to identify exactly what the problem is before you start, because if it is bonded dust, you need to be extremely careful if severe marring is to be avoided.