Hi Guys,

My front bonnet has a mineral build up from a leaking water pipe from a city car park. It is basically like a calcium build up above the clear coat and paint. I want to avoid using any cut polish - so any suggestions in how I may be able to remove it. Simply placing water and working the area hard has not done anything.

Any suggestions are welcome.

Cheers,
Daryl

Depending on the mineral content try vinegar - but test it on a hidden area of paint first as its mildly acidic in various strengths

Vinegar is a good bet, it is how i remove the limescale build up from my taps, but careful with the strength, would as above test on a concealed area first to check it doesnt react with the clear coat.

If not, then loads of paper towels soaked in vinegar solution applied to the area and left for half an hour or more..... There is nothing that can't be fixed with a hammer😜😜
FFRR 4.4 SDV8 Autobiography Santorini Black.
KIA E-Niro 4+
2021 Discovery 5 D300 MHEV commercial

Like NMJ says, use the soaked vinager (mixed with water to reduce the strength a bit) and leave it on for half hour goes at the time. Just repeat it. After every soak, use a lot of clean water to get everything off, asses the result and then do again. Small steps is the trick here I guess. MY 2010 5.0 SC Galway green and sand interior!!
Have the Faultmate MSV2 Extreme to be tinkering with the settings etc. !!

Thanks everyone tried white vinegar and it worked a treat. First tested on a small area to see if it reacted and nothing. The buildup removed in no time at all. Thanks for the great advice

 There is nothing that can't be fixed with a hammer😜😜
FFRR 4.4 SDV8 Autobiography Santorini Black.
KIA E-Niro 4+
2021 Discovery 5 D300 MHEV commercial

Does this trick work with the "sahara rain" deposits? I keep getting these water marks that seam to have eaten their way into the paint... Thanks in advance guys

More for dissolving calcium, but worth a shot, so longs as you try it on an inconspicuous place first..... As they are small deposits should only take a minute or 2 soak. There is nothing that can't be fixed with a hammer😜😜
FFRR 4.4 SDV8 Autobiography Santorini Black.
KIA E-Niro 4+
2021 Discovery 5 D300 MHEV commercial

Glad to hear !!!  MY 2010 5.0 SC Galway green and sand interior!!
Have the Faultmate MSV2 Extreme to be tinkering with the settings etc. !!