I really need an advise of how to proceed for the best result with an old plaster coving preparation and painting. I have made quite a lot of research on the forum and main site but still not clear what paints need to use for best result. On all the over covings so far in the house just painted after prepping with water based Johnstones Covaplus Vinyl Matt Emulsion which end up doing three coats on some spots to have a good result.
Though in this room the paint all around the plaster coving is loose and flaky on most part of the coving. You just put a little pressure with your thumb and cracks like a potato chip. There is vacuum between the plaster and the paint.
I am in the process to remove all the loose paint, sand carefully with 180 sand paper where necessary. I will hoover to remove any dust and even clean the plaster with a soft wet sponge at the end. Then will fill the cracks and lightly damaged plaster with Toupret Redlite.
The paint on this coving feels in really bad shape. I think it might be a good idea for at least the 1st/2nd coat to use a better paint to seal plaster and bond the old paint together.
Which paint should I use for good/lasting results?
In a similar article was mentioned Zinsser AllCoat, several times I have read about Bulls Eye 123 good results and I have in mind the Zinsser Gardz which was mentioned in another article for fixing plaster coving. I was even considering the Classidur Aquaclassic but it is too expensive.
Can somebody confirm if my preparation steps are correct and if I have missed something and which paint should I use?
Thank you so much for your help in advance. This forum is awesome, so far with all the advise in materials and paints i had amazing results in the house and finished rooms really stand out.