Thanks for that , Sharon. Unfortunately, where the durability of painting techniques is concerned, all observations/information end by being anecdotal from the scientific point of view. This is owing to the fact that the self-same materials handled differently by different people, in different combinations produces an infinity of results without any standard of controls by which to compare them.

There's enough hearsay, misuse, and controversial strife over painting materials that have been in use for decades and centuries, Which is the reason I feel it's so unnecessary to go looking for a "magic bullet" without any "lore" to support its use. For anyone who insists only modern synthetics can produce effects they "need" to make their paintings, I'll guarantee the problem has already been solved . . . in most cases, hundreds of years ago!

There are so many permutations of synthetic materials around, I'd be foolish to state this as a fact, (not having recently examined them) but I don't believe acrylic chemistry is employed in the forumulation of either Galkyd or Liquin. (???)

FWIW, as far as automotive coatings are concerned, acrylic chemistry clear coats and paints in general are an improvement over alkyd resins.

I agree with Richard: why tamper with a proven method? Linseed has been shown to stand the test of time. I myself have had delamination problems with paintings containing an alkyd, too. I used Liquin and will be reluctant to ever touch the stuff or use any other alkyd mediums again.