Cheap paint for projection

Has anybody had any experience with any kind of market grade white paint to be used onto projection surfaces.
We have this 120 squared meters screen which we ve painted with matte white paint last year, the result was not so good (kinda yellowish), so we may paint it over this year but at 120 squared meters we can t afford any Goo stuff or similar, we need to get stuff at the local hardware store.
Any experience ?

Bump on this one?

IIRC we used this paint for the projection of Memo/Rainer/Daniel’s stuff at Node13.