I'm about at the point of primer painting the tender of my BR/SR "Q" Class model, and I gather that ordinary primer doesn't adhere too well to brass, so I can't use my normal primer on the bare brass, although I understand it can be used on top of the acid etch primer after 24 hours. So, my question is, what do the other brass modelmakers use? I understand there are single pack types which have a limited shelf life of about 12 to 18 months from manufacture date, or two pack 'mix together' types which have a more or less unlimited shelf life when kept separate. As I'm not likely to have many brass models to paint in the future, the single pack type would probably be adequate for my needs as I should have the remaining kits I have, assembled ready for paint within a year or so, and obviously if it comes in a 'rattle can' that would be easier than having to also buy special thinners/cleaners if I were to use my airbrush to apply the primer. Suggestions/recommendations/idea's anyone??? Keith.