Testors.

This stuff was recommended to me and it took a while to track down.

In the end I got a couple of cans from one of the wargaming suppliers- not cheap about £16 delivered.

However, not absolutely convinced about how good it is as a coating across some transfers which had been applied over gloss varnish didn't remove the gloss that Railmatch did- the  Railmatch can is bigger also.

So the jury's out until I get something more substantial to varnish.