How could I remove these deep dirt stains? (i promise it’s dirt)

How would I go about cleaning this white buildup?

What about it?

Is this efflorescence?

Sweat stain. Would be okay with converting the whole hat to sweat color at this point.

What about it?

Tried soaking the whole hat and scrubbing with laundry detergent. I don’t even need the hat the original color, as long as I can get it back to one solid color

Are these stains removable at all?

What about it?

Found these stains on a chambray shirt, any thoughts if I could even get them removed? If yes then how?

how to remove orange color from chain of bike?

What product would you recommend clean this neglected iron without damaging the surface of the iron? How should I go about cleaning it?

Copper Oxidation?

What about it?

This started to show up in my shower/tub. It was an emerald green until my boyfriend put bleach on it and it turned black/brown? Has anyone seen this? What is it and how do I clean it? Help!

How to clean brass drawer pulls?

What about it?

I’m painting my kitchen cabinets. I thought I might try to keep the drawer pulls and maybe spray paint them. How do i get them really clean? They’ve been in this house for 30 years I think.

Cat urine in wood cabinets

What about it?

Not a great picture, but we just bought a house and I opened the cabinet under the kitchen sink and got assaulted with cat pee smell. I believe the previous owners had older cats that would pee in places they shouldn’t (obviously). Any suggestions on how to get rid of the smell? I have some Nature’s Miracle enzymatic cleaner, but I want this smell completely gone, so I’m willing to use something more powerful to ensure it gets eliminated. These are stained wood cabinets though, so I have no idea what would be safe to use. Thoughts? Advice?

What are these stains on the roof?

Laundry Detergent fell and splashed on this untreated wood door. Best way to clean?