Detailing noob

[Rory]

Bird Droppings-
Posted a pic. There's no way I'm sanding anything, will screw it up completely probably. Will try the vinegar thing.

Rims-
I do actually have a brush. I should use it It's not perfect for getting into the corners as it's based on a round wire but the bristles do help. I think it's the cheap one from makro.
I have some stuff that you're supposed to spray on and then wash off but it hardly worked at all. Normal shampoo had more of an effect. Checked now, it's "Rally magshine", waste of money if you ask me. I hope the products recommended here are a LOT better...

Spots-
Tried taking a pic with phone but you can't see them at all.

Yellow spots-
Yes they are crumbly etc. I washed my car this weekend so can't take a pic. They come off easily with a nail. Seems to me that nothing is better than a fingernail and some elbow grease...

Auto armour-
I'm not sure if it was auto armour but It was something like that. Either way I guess it's long gone.

Wanted to ask about claying, I've read quite a few things about it but still don't quite "get" it. What exactly is it meant to remove and why can't that be removed by other stuff?

I was looking at getting the maxi suds and citrus wash. Maxi suds seems to be recommended for the pressure washer to get nice foam. Need to get the karcher "foam" lance as well though.

If I wash the car with something that removes the protection etc then what if I miss a spot when I'm waxing it?