I have found acrylic on enamel to work ok, as long as it's not to heavy and wet.
I have had a lot more trouble with acrylic varnish spray cans, it needs to be well shaken not stirred.
I called into Halfords today to get some grey primer.
For 500ml it used to be £7.49 but now it costs £11.99.
So I will be getting it elsewhere from now on.
I got a small parcel from Royal Mail a while back.
It should have been signed for but he left it outside the door in the rain and left without a signature.
It was soaked as it was only wrapped in brown paper.
Very bad service.
There generally seems to be an under estimation with new models that sell out on pre order, so maybe a production run should be
increased to give more people a chance to buy and for those new modellers coming along.