I have an older house, circa 1920, that has original Sheet Rock interior walls. Looks like, in those days, the walls were meant for wallpapering. Over the years, the paper has been stripped and then the walls painted. There are cracks at most of the joints, and it looks as though tape or other seam treatment was not used back in those days, perhaps because paper would cover them. Now the walls are painted and I want to repaint them, but would like to find a way to fix the cracks so they don't just show up again. Do I need to tape these joints, and if so, can that be done without it showing? I found something in a spray can that is supposed to seal cracks, but haven't tried it yet. Thanks.

Hello, New here. Sorry if I am about to ask information they may have already been covered. Over the holiday weekend I hope to finish a project I started 3 years ago. I am covering dark paneling which I already primed with Kiltz but have now decided to texture to avoid having to do any more sanding. This place is up for sale and funds are limited so instead of buying premixed texture wall paint I was wondering if I can mix my premixed paint color with joint compound to also avoid an extra step in the process. My brother did this years ago on the ceiling (and maybe the walls too can't remember) in an old apartment that was in an old building with crooked walls, but I can't remember how to mix them together so that it's not too thick or too thin.