Sorry if this is a dumb question but I've spent the last 2 hours searching and still cannot find the answer. 
There are some advantages to projecting onto a bare wall that appeal to me.
1. A slightly greater throw distance which means a slightly larger picture.
2. Screens tend to be unsightly unless they're the kinds that totally disappear into the ceiling.
3. Other than using Goo paint, projecting onto a bare wall is a cheaper solution than a screen.
Since I haven't found any detailed discussions about how to properly prepare a bare wall and since most paint discussions seem to be about painting screens, I sorta suspect that projecting onto a bare wall must have some serious drawbacks.
I appreciate any guidance anyone may offer and again, sorry if this is a profoundly stupid question but I promise to never ask it again.
TIA

There are some advantages to projecting onto a bare wall that appeal to me.
1. A slightly greater throw distance which means a slightly larger picture.
2. Screens tend to be unsightly unless they're the kinds that totally disappear into the ceiling.
3. Other than using Goo paint, projecting onto a bare wall is a cheaper solution than a screen.
Since I haven't found any detailed discussions about how to properly prepare a bare wall and since most paint discussions seem to be about painting screens, I sorta suspect that projecting onto a bare wall must have some serious drawbacks.
I appreciate any guidance anyone may offer and again, sorry if this is a profoundly stupid question but I promise to never ask it again.
TIA














Did I just say that? 



