Stains on bonnet paint

veganrun

My car used to be parked in an underground car park and there was some sort of pipe above the car that had something dripping out of it from time to time. As a result, the paint on the bonnet looks a bit dirty/white powdery look to it where the liquid fell. The car was washed recently but that didn't remove the marks.

Is there some sort of polish I can get to remove it? It's not anything serious and I'm planning to trade the car in next year anyway but i'd like to touch it up myself if I can.

gravity10

Sounds like its drips of concrete. Try using half a lemon (yes I'm serious). The acid will begin to break down the lime in the cement if its not too thick. You won't risk doing damage to the paint either, which is a bonus. I run a few valeting and a detailing business, I've seen and rectified this a few times, all from the same cause.

mik_da_man

Seen this before also.
Clay bar and well lubricated paint should sort it

gravity10

I'd be wary of using clay because of the potential grit particles in the concrete causing marring. Of course this is nulled if you are correcting the paint afterwards.

veganrun

gravity10 wrote: »

Sounds like its drips of concrete. Try using half a lemon (yes I'm serious). The acid will begin to break down the lime in the cement if its not too thick. You won't risk doing damage to the paint either, which is a bonus. I run a few valeting and a detailing business, I've seen and rectified this a few times, all from the same cause.

How would I do this? Do I squeeze the lemon juice onto the paintwork then just use a cloth or rub the half lemon on it?

Sorry for the stupid questions

gravity10

I'd cut the lemon in half and rub gently with the lemon itself to apply. Maybe a microfibre once it starts moving - do not scrub or use too much pressure: you'll damage the paint.