Thanks for all the advice. Sounds like application during fermentation will produce a good mold coverage and ward off nasties. Maybe a later application can produce a milder appearance of white covering, I like the look of this too. I know that the appearance of the mold is not the significant factor but rather the protective qualities that it bestows but call me shallow, I like the look of it!!!
I have some sausages ( pork and date and pork and duck) about 4 weeks hanging and I have needed to wipe them down with vinegar twice due to suspicious looking furries and these have not returned.
I am going to spray them with a mold 600 solution while they finish drying.
Will let you know the results.
When I get a camera i will post some pictures.
Diolch yn fawr
Pablo.