Yeesh! Where to begin. I believe our (first) home is a 1950's home w/ plaster walls. I started picking at some 'curdled' glossy paint in the hallway and 'plastered' back over it w/ joint compound. My initial intention was to sand smooth the joint compound and go on my merry way of priming/painting. Come to find out that a leak from our bathroom sink got in the wall (explains the curdled paint). The leak has since been fixed, but now I have a water stain on the joint compound (not sure if it has totally dried and set up).
I have seen 'spray on' texture and thought about 1) priming the walls (which have a high gloss paint), 2) spraying on the texture to even things out, then 3) painting the desired color.
My concern is getting too many layers on the wall and having it fall off . . .this happened in the nursery after only priming. If we didn't have little ones in the house, I'd just sand over the whole thing and start over w/ joint compound, etc., etc., except we're concerned about lead paint. Lead testing in the nursery came up negative.
HELP!!! Thanks in advance for reading this monster and for any input.