Bird Droppings on Car Paint: How Fast They Damage It and How to Remove Them Safely

Remove bird droppings as soon as you see them, ideally the same day. They are acidic, and in Bangalore's sun the heat softens the clear coat so the acid etches in faster. Soften the dropping with water first, then lift it off. Never scrub it dry. If it has already left a dull ring or mark, that is etching in the clear coat, and it usually needs machine polishing to remove.

Bird droppings contain uric acid and often small grit from seeds and stones. On a hot panel the clear coat expands slightly, and as it cools it contracts around the dried dropping. That is why a dropping left on a car parked in the sun can leave a permanent mark in a few days, while one on a car in a shaded basement may wipe off cleanly.

The grit is the second problem. Wiping a dry dropping drags that grit across the paint and leaves fine scratches around the mark.

1. Soak it. Lay a wet microfibre cloth over the dropping for a minute or two, or spray it with plenty of water or a quick detailer.
2. Lift, don't wipe. Pinch the softened dropping up and away with the cloth instead of rubbing across the paint.
3. Rinse the area. Wash away any remaining residue with clean water.
4. Dry gently. Pat dry with a clean microfibre.

Avoid tissues, newspaper, kitchen towels or a dry hand. They push the grit into the paint.

A dull patch or ring that stays after washing is etching in the clear coat. Light etching can usually be removed with machine polishing, which takes off a very thin layer of clear coat to level the surface. Deep etching that has gone through the clear coat cannot be polished out and may need the panel repainted. A specialist can tell you which it is by looking at it under proper lighting. See our guide to paint correction for how that works.

• Ceramic coating gives the paint a harder, slicker surface, so droppings bond less and come off more easily. It buys you time, but you still need to clean them off. More on ceramic coating.
• Paint protection film (PPF) puts a sacrificial layer on top of the paint. If a dropping does mark the film, the paint underneath is untouched. More on PPF.
• Parking habits: avoid parking under trees where birds roost, and keep a microfibre cloth and a water spray in the car.