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Efflorescence on my paint job after garage storage?

1058 Views 5 Replies 2 Participants Last post by  plinker17722
My W140 has essentially a perfect original paint job,silver color, and the car is stored in my garage most of the time.
When I went in to check it this week, I saw what I thought was moisture condensation on random areas of each side of the car, not the top, hood or trunk. However it was not moisture, but rather a silvery material in streaks, with some adherence to the paint. I could gently wipe it off and the underlying paint surface was normal. I checked the roof for leaks above these areas, as we have had a lot of snow here in the NW recently, and then a rapid thaw and melt.The roof was fine. However I note that the cement floor has white deposits, and these are termed "Efflorescence" literally meaning a "flowering" or emergence of alkali salts from the concrete, which come to the surface with moisture, the moisture evaporates, and the salts are left behind.

The garage is beside a road that was heavy with snow, now all melted, so that could be the source of the moisture.
I have never seen this before and the car has been stored for years in this garage with no such deposits.

Any ideas of this or other causes? I am going to gently wash the car to remove them, but again I see no evidence of paint damage.
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Caused by damp and cold that change to patches of condensation then to efflorescence..
Used to get it on our wall in the bedroom of mobile home [caravan] wont harm your paint work ..i would get an indoor car cover to put on in cold weather
AZMIT123 And the cover might mark the paint Paint hardens quick and i dont think cotton sheets iwould hurt it . What about a small heater, just to lift the temperature up a little ? But better still a de humidifier i used one in my caravan to clear all the condensation away and it sends out warmer air after .
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Your lucky mine sits out side every day .. My other half took charge of the garage when we moved in .At the time i did not have a car . But after i purchased the W124 i use a fully waterproof car cover for the winter . The cover is better than nothing , and it stops rain water entering nooks and cranys .The engine is packed up all around inside the hood with warm items . She is warmer than i am in bed lol .. Vehicle cover Tire Wheel Automotive tire Hood
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