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Hi guys, Few years back i painted my bedroom wall a dark red color. Immediately white patches begin to show up. I tried wiping them off but it came back shortly after. I didn't use any primer for that paint job. Now i am sick and tired of these ugly wall and planning to paint them. After reading thru forums, i believe the root cause is the absence of the primer cause the water from the previous paint job to seep into the new paint. My question is, before I prime these walls, do I need to completely remove these white patches first, then prime them or just leave it as it is and paint over them? I am afraid I might make matters worst since i will have to wipe them with water, and prime them after would cause more disaster since the issues is water to begin with. Also I realize that place where my head always lean on the wall when I have hair oil(olive oil) seems to clean of the white patches really well. I thought maybe I should wipe my walls with light coat of olive oil and then start with my paint job (primer included this time). Do you think this would cause any problems? Next what primer do I use? Is water base primers that claim to be have amazing sealant power be sufficient? or is it a must to use oil- base primers? I read it's a huge hassle to use oil-primes, I really am leaning towards water-base primer because of this. I am looking at Benjamin Moore paints which are latex base-paints. Can I use a latex-base paint as a top-coat over a water-base under-coat? same goes for oil-base under-coats, is it advisable to use a latex-based top-coat? and have anyone tried using Benjamin Moore paints? which ones do u recommend for our normal HDB wall. You can see I am truly armature here, I hope anyone who is knowledgeable can shine some light on this. I have also attached the photo of my horrific wall.
Hi guys i need help about my walls. 5 years ago i painted my room with two tones, red and orange. Red using Nippon Vinly Silk and orange using Dulux Pentalite. The walls were painted without using any primer. I painted it over a flat finish white wall. Before i started painting the walls i wipe down the walls with 1 part bleach and 5 parts water. Then two weeks later after painting white spots and patches started to appear on colours. i gave a wipe with bleach and water and it disappeared but return eventually. It really pissed me off. Every 6 months for the pass five year i have to wipe them off. The spots the decreases every time i gave it a wipe though. Now after 5 years i'm planning to paint my walls again to a dark grey tone but this time i don't want to deal with this white spot reappearing. Could anyone tell me if this is mould, mildew, fungus or alkaline. What can i do to prevent this spots reappearing again. this time I'm gonna sand my walls down and apply primer. Need a recommendation of what primer and solution base wall cleaner to use to prevent this spots from reappearing. I could really appreciated the help from you guys before i start painting. Here is a clear photo on how bad these white spots can be. The left side recently wipe off and the right didn't bothered to wipe for years because the wardrobe was in my way.