Hello Balego, My name is Christine and I'm a paint associate at The Home Depot. First you should lightly sand the surface with a medium grit sandpaper. Your goal here is to remove the Feed-n-Wax. Then use an oil based primer. After the primer dries, you can use either use an oil or latex based paint. I hope that helped, Christine

I will answer this one in 2 parts. 1) If you have plaster walls, then your home was most likely built prior to 1978. It depends on the area, I suppose, but the majority of homes built Pre-1978 have dangerous amounts of lead in the paint. Because of this, I highly recommend either getting a lead test before DIY-ing it, or hiring a professional company that's certified to do lead abatement and lead maintenance repainting. If you scrape/sand/etc over lead paint with children in the house, then unfortunately, asthma and allergies will be the least of your worries. Lead has been shown to cause severe birth defects in fetuses of pregnant women, as well as learning deficits, lowered IQ, organ damage, ADHD, and other serious problems in children. It also affects adults, although to a lesser extent. Lead dust/chips, when inhaled or swallowed, stays in the bone marrow for decades and slowly releases into the bloodstream, where it damages organs including the brain, liver, heart, etc. ================================= 2) If by plaster you really meant to say "drywall", then unfortunately, the only way to hide this defect is by applying joint compound, sanding, oil priming and painting. If your son has asthma, a way to counter this is, ironically, doing the same thing a lead abatement company would do: Quarantine the area off with plastic and painters tape (they use duct tape and 6mm plastic for lead, but you dont need all that), turn off the AC/Heat and plastic the vents and return system, and completely box in the area sealed tight. Then, once he is done, have him do the "TSP sandwich"- clean the dust up with TSP mixed with water (8 parts water, 1 part TSP), then have him use a HEPA vacuum to vacuum all of the area, then wet-wipe again with the TSP/water combo. At this point, have the area air scrubbed with a HEPA filter (air scrubber preferably, but a lower strength one will do), then remove the plastic and immediately bag it. Problem solved. ALSO, one more thing:Even if a self-leveling paint could cover this ridge(which it wont, self leveling doesnt work over obvious ridges like that), then you would still need to clean the walls with TSP and water and then apply an oil primer before doing the self-leveling paint, in order to clean and then prime over any remnants of, the wallpaper glue. If you just put the paint over the ridge as it currently is, it would probably start to peel due to the wallpaper glue or glue remnants.

YOu will need to lightly sand,apply a GOOD bonding primer,paint.

You don't need to sand it if you degloss it with Dirtex or Jasco TSP "substitute". You'll need a silver base to cover the existing gold tone. Most craft shops have antiquing paints and ideas. Michael