That stuff should come with rubber gloves, it's so powerful.

I would have recommended simple green as a good balance between power and safety.

at my parent's home. If the plaster is smooth, use a mop with a brand new sponge head (the dense yellow kind) and dawn dish detergent. Make sure to vacuum any cobwebs first, then start at the top of the wall and mop down in even rows with a little overlap (like using a paint roller). The mop should be rinsed and wrung out fairly well after each 1/2 to full row. If the paint is flat, wring the mop out fairly dry and use a lighter pressure, short strokes, a smaller angle and an appropriate amount of elbow grease. Change the rinse water very frequently. Mopping works also on the wood work. For scuff marks of any color use a rag with a little comet and scrub a couple times directly on the marks and they will come up almost immediately. If the plaster is textured you will need to go the tedious route with a tough, non-colored rag that won't leave filaments behind. (Had to do this in a textured hallway and it was a chore!)

Good luck and take lots of breaks.

If you use it, be sure to wear gloves and safety glasses.

tsp was my thought also. test on a small area first.

I was always told start at the bottom and work up, otherwise drips happen on the dry area and are hard to get rid of for some reason.

It's an excellent cleaner/degreaser and can be cut with water to a strength to meet your needs.

I'm a semi-retired painter, and we used a strong solution as a part of our paint prep ( just follow the directions, as an overly strong solution will kill the gloss of your coating; a positive when doing prep work, but not what you're looking for).

It is also very economical when mixed for general cleaning.

Good luck with whatever you decide.


edit: i just noticed the date of the OP...whoops!

Get many cans of it. (I had about 750 square feet that had been chain smoked in for about 20 years to the tune of 2 packs a day and it took like four to five cans)

Spray the scrubbing bubbles on your wall DO NOT RUB IT OFF. Let the bubbles move down your wall, and add more bubbles as you see drips forming so that there are no drip marks. After you've thoroughly coated your wall (work in spaces) rinse it off with a rag and some warm water.