Any insight into the archival properties of using water mixable oil paints either alone, or as underpainting?
i think is should be considered as archival for water miserble oil as the manufacture should perfomed accelerated age testing to proof the surfactant not negatively affect anything. however based on my own testing, as the surfactant is not part of drying formula, it may result a sticky feel film compared w/ traditional oil. and the WMO film remains more flexible/ soft as well, it may be an advantage as oil will brittle over time, if the presence of surfactant of WMO can make oil film more flexible over time, then it is a big plus.
i heard when Golden test oil cracking over gloss medium, someone mentioned if using WMO over gloss medium, it doesnt crack as traditional oil would, so maybe indicate above flexibility statement.
hope material scicentist can give more insights!
I beleive that much of this has been covered here in the past. Please do a search.
