I now never use spray paint for this problem. I even use brush on primers as I tend to find spray primers always miss some bit. I get my varnish from here
http://www.antenocitisworkshop.com/warg ... rnish.htmlI use the Daler Gloss and the testors dullcote. I have never had a problem. Its takes longer but is worth it in the end. I also tend to leave at least 3 days but usually a week between glossing and then painting matt.
I also use the vallejo white and black primers and brush them on.
Does testors dullcote completely remove the shine without any problems? I've heard good things about it but didn't think it was sold in the UK anywhere. Thanks for the link.