Painting over a surface damaged by acid

[jacko]

I used a sulphuric acid based drain cleaner to clear a drain blockage. Unfortunately I got is over all over the walls and some ceiling tiles (stupidly I used a compressed air gun after laying down the acid and it shot it out of the trap!!!!)

I washed down the surface and painted it, however the acid still remained over the walls and it shows through the paint.

I then used a paint stripper to remove the new and original paint, washed it down thoroughly and repainted. Still the same problem!

Is there any primer or sealer that I could use to stop the acid from affecting the finish?

Hope someone can help

Jack

 

[oilman]

You will have to neutralise the acid, you may be able to do it by spraying the area with sodium carbonate solution, and then rinsing with water.