This book explains how to handle security deposits in CA:  https://store.nolo.com/products/the-california-landlords-law-book-lbrt.htmlThis is a pamphlet that used to be put out by the Department of consumer Affairs in CA (they quit publishing it a few years ago), that contains a section about what you can charge as far as painting, etc., based on life expectancy of things.https://www.achhd.org/documents/California-Tenants-Guide.pdfAs to the cupboards - normal wear and tear is when something happens with normal use over time. 

This is addressed on the CA Dept of Consumer Affairs website on security deposits and deductions.  

But if you have observed corporate formalities and kept the LLC separate from your personal affairs, they will not be able to obtain a judgment against you personally, even if they name you personally as a defendant.

In CA, on the consumer affairs dept website, this is listed as perfectly acceptable - for landlords to charge reasonable hourly rates for their time.  

Others rather use cash app; my rentals are SFH so I use a PO Box for all my business affairs.

At that point there is not much else you can do and if you do you run the risk of getting involved in tenants personal affairs which I would highly advise against. 

You also should check your state's Department of Consumer Affairs under tenant-landlord law, rights, etc, which explains those laws in plain English.

Here's the CA Dept of Consumer Affairs web page that explains that late fees must be reasonable and reflect your out of pocket expenses - that they can't be used as a penalty:http://www.dca.ca.gov/publications/landlordbook/li...If I can find a better resource later, I'll post it.  

Also consult California's Department of Consumer Affairs to get a better handle on your rights as a landlord.

Just as a reference on the subject, here's a quote from the CA Dept of Consumer Affairs website: If the landlord or the landlord's employees did the work - The itemized statement must describe the work performed, including the time spent and the hourly rate charged.