Can't read data from static mesh?

Hello

I'm using static flag now as it seems better since unity 5 than combine them with a script. Problem is i use a couple of functions that need to acces vertices, triangles etc from those meshes (for drawing a mesh for a decal) and Unity tells me I can't.

I can't set them to non static and back to static on the fly since it would need the editor.

I understand that the engine need to protect data from being written but the reading? I don't get why it would be also protected... Maybe i'm doig something wrong. What's are your thoughts on this?

Btw my meshes have the write/read check so it's not that, it works only if i remove the static flag. I can't afford that or i have to return in the old way... Combining myself.