best bet is mix some up and spray over a few pieces of scrap metal if it doesnt react on what u spray over it will be fine i use celle to thin hamerite paint and have sprayed over standard household gloss paint it softens it and takes a day to fully dry but worksWhere we used cellulose in UK you would use acrylic lacquer in USA however now that VOC paints are supposedly banned here we seem to be able to get acrylic in out spray cans when I think it would have been cellulose years ago.
I use a lot of Metalflake Corp acrylic lacquer which I love but the UK supplier no longer sells the Metalflake brand (acrylic?) thinners and I have lots of the paint to use up. Anyone know if cellulose thinners can be used in acrylic lacquer?