Perhaps the important thing is that, when I have to scrape off a layer of bird poo, the paint doesn't come with it.....All I know is that Interdeck was a much more durable paint than the Multicoat I was persuaded to change to by International a couple of years ago and which I now have to scrape off.
Not correct I'm afraid. Interdeck is an alkyd / urethane hybrid. Toplac is a silcone / alkyd hybrid.Interdeck is the the same as Toplac, with the granules already added.
If you prefer one of the Toplac colours then you'll have to add a sachet of the International granules and you'll then have Interdeck with a bigger range of colours.