Workable Fixative over Underpainting?
 

I recently acquired a book by Frank Covino that endorses the use of a workable fixative sprayed over a "rub-out" method underpainting after it is dry to the touch. Thin glazes of color are then applied. My question is: Does the fixative adulterate the layers of painting and would the layers of glaze have to be "fatter" than the linseed oil/paint used for the underpainting? What happens to the fixative when it comes in contact with more layers of glaze? I have a wonderful underpainting and I would hate to ruin it.

I hope this question makes sense.

Hello Julianne:

Covino's current method is to use Retouch Varnish to both seal the underdrawing in charcoal and to bring any sunken values up in the monochrome underpainting.

I suspect that the reference to using workable fixative is old knowledge. These days he would recommend retouch varnish for that.

If you have an underpainting, then my recommendation would be to only use the retouch if you have areas that have sunk in. If your values are right, then just start painting in color. :)

How long is long enough?
 

It's been a while since working with oils. I've never use Covino's techniques, but I'm betting excellent results. How long do I wait before beginning to add the additional layers of glaze? Does each layer need to be completely dry prior to adding the next?

Thanks for the information Michael, I know you've been through Frank Covino's workshops, and I truly value your opinion.

Hi Julianne,

Try the "Search" icon at the top of any Forum page. If you tyoe in "glazing", you will get this.