bird doodoo etch/mark keeps coming back after scratch x

[silversx]

i got 2 spots of bird doodoo on my car last week.. and washed it on friday.. afterwards i saw hazy cloudy marks where the doodoo was.. im not sure if i would call that etching or hazing

so i used scratch x on them and suprisingly they vanished after one application.. but on sunday.. i noticed the hazing came back like magic..

i used scratch x again and with minimal effort they were gone..

today after a full day parked in the hot sun.. they came back again!!!

is the scratch x removing it? or is it just blending it.. is the hazing caused by residual acid in the pores of the paint??

if so how can i lift out that residual acid.. i read about 50/50 IPA and water.. and also something about baking soda/water..

can anyone with the same experience tell me how to get rid of it once and for all???

[DogParkGuy]

Bird **** will etch the clear coat if left on too long. You may need something more aggressive than Scratchx to get rid of the mark.

[jfelbab]

My theory.

Bird droppings can be highly acidic depending on what they eat. Once on the car that acid starts to eat away at the finish. Your paint is porous and the acid can get into the pores and dry. When it gets dampened or wet again it can start to do it's damage again. I'd suggest washing the area with a bit of baking soda to neutralize that acid. Wash it a couple times then have at it with ScratchX and see if that works.

It is important to remove the bird dropping as soon as possible. I carry a bottle of QD in the car for just such emergencies. The QD will effectively remove most of the acid but I would still wash the spot with baking soda when you get home and rewax.

[RedSoxRacer]

Originally posted by jfelbab
I'd suggest washing the area with a bit of baking soda to neutralize that acid.

Just make sure you mix the baking soda with water and try to get it to dissolve as best you can. Baking soda is pretty gritty and will scour the finish if you use it in powder form.

[96Lude]

I sometimes use #34 Final Inspection to remove bird droppings. It seems to work quite well. I spray it on and let it soak for about 30 seconds, then I wipe everything off with a MF towel.