If you're tired of posting and replacing no-tresspassing signs that are weathered or vandalized just to keep people out of your woodlands and limit your liability from trespassing injuries, a new law has been passed to help you.
Here is a link to a recent article about it: https://www.theindychannel.com/news/state-news/purple-paint-law-goes-into-effect-july-1
The rules are fairly simple regarding how to mark your boundaries, however I would not proceed until I was very sure of the boundary locations, either by an official survey or known land markers, etc. Often your farm manager/forester is well aware of these boundaries, at least unofficially, and can help you locate them. GPS can help, but in woodlands is spotty and only accurate using high precision instruments.
I have already received a request to mark the boundaries of a large property, and we are available if you decide to ditch the signs and go with purple paint to mark your property boundaries. Just give us a call! If you decide this is a DIY project, I recommend contacting our local tree paint manufacturer, BarkMark, in Niles, MI.