I have to accept culpability for continuing to purchase Ratio products that i know will present me with unforeseen difficulties because every one I have ever bought previously has, and this one is more annoying than all that difficult, but what, I thought, stupidly, can go wrong with fence posts...
GW wooden ones with angled tops and grooves for the wires to fit in, in black plastic, complete and ready to cut off the sprues, clean the pips off, and paint, then you plant them where they are going to go, don't you? No, you don't, because the paint will not key to the plastic. I mean, come on, this means I have to either abandon the job, or file each face of each post individually to provide a key for the paint, or just let them be shiny black plastic, not acceptable. I suppose I can console myself that the pathetic scratchings of the file look a bit like wood grain, but they don't really.
Paint is acrylic, and it is possible that enamel would key better, but I do not use this because of the smell in the living area of my flat. I tried an undercoat of matt varnish, to no avail; this is going to make what should be an easy and satisfying job into a nightmare of handling small parts and hurting my fingers. I'm just going to have to spend an unsatisfying hour with a file, and hope that works!