Lars wrote:

I forgot to mention that the undercoat is not oil based. It says it
is alkyd based and takes about 4 to 5 hours to dry.

When it dries it kind of looks like emulsion paint.

Alkyd is oil based household gloss, and undercoat. Not ideal but sure
it works.

Or if you need white emulsion on a shoestring, you could use lime
paint. =A36 will get you enough white paint to paint the neighbourhood.

NT