Zinsser Ceiling Pro 5-in-1 to bridge hairline cracks on walls?

[DanielWestern]

I have a couple of walls in my Victorian terrace property with very thin hairline cracks that show through the paint. One way I could fix these is to use tape, but I find that fiddly to use. Then the other day I noticed I still had quite a bit of Zinsser Ceiling Pro 5 in 1 paint left over from recently painting the ceiling. One of the features it claims is that it bridges hairline cracks, I suppose because it is pretty thick and viscious.

So I had the idea of painting over wall using the Zinsser Ceiling paint, as an undercoat/primer, which should help hide the hairline cracks, and then refinishing with my wall emulsion afterwards.

Is that a good idea, or is there a reason why I should not do this?

 

[Wayners]

Lime plaster?

Shouldn't really use that paint on lime plaster.

Why not use lining paper and paint as an option.

 

[DanielWestern]

No, gypsum plaster walls.

Yes lining paper is always an option, but not preferable because:
- I don't have experience putting up paper, and would rather not get a decorator in
- the hairline cracks are only in a few places and one wall in particular, so feels a bit overkill to put lining paper on the whole wall (and probably the rest of the room if it looks inconsistent)

was just looking for a quick and easy solution, if such a thing exists!

 

[Wayners]

Run a knife along crack to make bigger and fill would be easiest
Other option is to use toupret flexible filler or go for your own plan with zinsser paint.