I made this Caley Horsebox some time ago and I decide it was high time that I painted it; in fact it’s high time I addressed a backlog of unpainted models, shunted into "Forlorn Sidings", gathering dust. When I was in Halfords a few days ago I bought a tin of their "Acid 8" spray etch-primer which I’d heard about and wanted to try for myself. I cleaned the model thoroughly outside the workshop in the garden using cellulose thinners, then dried it and sprayed on a couple of coats of "Acid 8". There was no mention of a critical curing temperature on the side of the tin; neverthess I put the model in my lightbox (just a cardboard box with a light bulb inside), and let the etch primer cure at about 30 degrees C for the rest of the afternoon before I took it upstairs to the studio. After 24 hours the primer was hard and, I’m pleased to relate, resisted my thumbnail when I tried to scratch it off the underside of the model. I’ll certainly use "Acid 8" on future modelling projects, it was a good buy; well worth just over a tenner.