Help! I was trying to remove spots of bird poop from my outside porch furniture- not only did I not remove the poo,

but now I have dark spots where i tried to clean. Any suggestions would be most appreciated- They are not removable and are a light tan in color. I first used spray N wash , then tried to clean with shampoo no luck- Then I spoted the stains with Tide.

way to much soap!

Also I have a white residue behind and around kithen Faucet on brown silestone countertop- tried vinegar to remove did not work!! Thanks Pepper