Q73: Can I mark property myself and, if so, where can I get the equipment?
Yes, you can mark the property yourself and there are lots of different products available, we cannot however recommend any specific products. Try Googling 'crime prevention marking' or something similar, but make sure you buy from a reliable source with which you are comfortable. Alternatively, speak to your local crime prevention department (via 101) who should be able to help you and some times they have campaigns during which they give away suitable markers.
Your insurance company may also be able to suggest products. For further information and other suggestions on making property more secure, please see links in related information.