[Cob] Water colour

[Amanda Peck]

I started to write "wow! you mean it worked?" but then I remembered that a 
lot of the artists paint type colors are mineral based  (Cadmium yellow, 
Titanium white, and so on).  But I still wonder a bit--are the colors 
staying true with that lime plaster?

Linseed oil would yellow everything, but if that shift was acceptable, would 
it work?
..........................
Pat Newberry wrote:

Just finished some small painting on lime plastered cob walls using water 
colours. It came out quite nice, especially given what talent I have.

I more than likely would have to seal it with something to keep clean since 
I could not wash over the water colour.

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