[Timborooni]

Most cleaning situations, a pail of plain water. Damp cloth, changing the water often. I would like to avoid applying something onto the surface that I will also have to clean off. Most often, "cleaning" involves sanding with a sanding sponge or paper. If washing, always dust before washing, or you're creating a sludge

The bane of a painters existence, most often in a master bath, hair (product) spray residue. Invisible, you don't know it is there until you do. Assume it is, wash first.

Oh, and also beware when wallpaper has recently been either hung or removed. The adhesive which inevitably gets on the trim will reactivate once a water based paint is applied. Even if it appears clean, give the trim paint a wash to stay on the safe side. Careful, don't let excessive water get under the edge of the wallpaper or it might lift.

 

[Timborooni]

Hmmm, I was never aware of that issue.

Well, maybe I went a little overboard with hair care spray products being "the bane of every painters existence". Most often it seems to be on bath doors right next to a vanity. First experienced by yours truly in probably '91, I can still remember the job. It was a horrible "what the what?" moment. It reacts much like wallpaper adhesive when painted over, inadvertently. I have seen it when looking at repaints since to provide an estimate, most often rental properties. The homeowner asks, "what happened to this door?" My answer? "It died". I know of no way to reverse the damage without the possibility of irreparably damaging the door. Cheaper and better solution to just replace, imo.