Yellowing Whites

It looks to me like you are bordering on "re-inventing the wheel" as well as confusing solvent based paint with a fired-on glazed coating.

In answer to your question, "Appliances do not seem to yellow" the reason is that typically household,heavy-use appliances, such as washers and dryers' coating are not a solvent-based paint, but a melted-on pigmented glass coating. The glass is a natural UV blocker, thus the pigment will not dull or break down, fade, yellow, etc. The reason why you only see this type of coating on metal and pottery is that you must melt the glass with intense heat for it to flow and bond as a coating. Plastic will not stand up to the firing process, any more then being left in your kitchen oven turned up high.

If you want to check it out, take a hammer with a pointy end and hit your glazed-enamel appliance (you might pick a spot your wife won't notice) and watch the glass coating flake off, leaving a nice little bare spot, usually of the base-enamel painted primer coat they gave the metal. When I did this by accident, when I dropped a tooI in the laundry room, I covered up the damaged spot with a nice, shiney gun-club sticker, and figureing it was just some of my nonsense, my wife never found out I damaged her applience's finish.

Similarly, go out and find an old '60-something car or truck, which should have nothing more then a painted enamel coating, and look for a dent in it. Notice that the solvent-based enamel generally flexes with the metal, with the only bare spots being where the sheet metal gets a crease in it,usually with no paint missing at the point of impact-flexible and rugged, unlike your washing machine's coating. I have actually pounded out dents of my older cars and simply had to touch up the piant where the creases were before, and the major dent needed no primer, since the paint just stayed put.

Now as for your "Dulux Aquanamel" paint, I don't now if you realize this or not, but the typical modern acrylic model paints are simply a water-based enamel paint.

Go figure:

  Aqua=water

  'namel=enamel

A razzle-dazzel label for seeking to market acrylics over latex for home projects.

Now that you know this, just why would you seek to do what others like Testors is already doing for us, especially considering that the pigments for scale model paints are disctincly different then those for general household purposes as well?

  Tom