Hello John, welcome the DMT-Nexus!
Let me start out by saying that you do not need to avoid self-incrimination on these boards. We actively promote keeping your identity and personal information to yourself in order to reduce the amount of information leading to your identity, but it's fine to use the "I" and "me".
Secondly, I agree with what ouro said. If you do not have any experience with IVing anything I strongly suggest you avoid IVing. In case you do have the proper experience, supplies and setting, go for it.
I did a quick google search for you and a lot of threads are showing up on drugs-forum.com. Take a look at this one:
http://www.drugs-forum.com/forum/showthread.php?t=104419. From quickly skimming over the text to see if it's any use it seems that the potency of IVing mescaline seems to skyrocket. Take caution and make sure to keep notes.
If you ever come to the point of IVing your mescaline, please feel free to share them with the rest of the world. The information on this subject seems scarce so any information is welcome.
Be safe and happy traveling.
The spice extends life.
The spice expands consciousness.
The spice is vital to space travel.