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I'm interested in finding an inexpensive replacement for the $15 can of chaos black primer. I looked on the can and I couldn't find anything that listed what type of paint it is. Could I get away with enamel flat black from home depot?
I'm not an expert on spray-on primer, so I can't comment on the Home Depot stuff, but I've used Testor's gray primer before, and it seemed to work just fine. A lot cheaper than GW, too. I know Tamiya makes a lot of spray paint, and I can only assume it has a primer too.
Outside of model paint companies, a lot of people talk about Krylon primers, and some even use spray-on car primer. Most people that I hear chatting about primers here say that GW's stuff is, at best, not unique among primers, and therefore isn't worth the higher price it costs. You're wise to look outside the GW range.
As long as you looking for black, most spray paints should be fine... White is a much more tricky one, GW white isn't that great but its the best I can find.
I'm building up a necron army so I'm pretty much focused on a flat black base coat. I really started thinking about this when I saw how much GW wanted for standard white glue. I understand PVA might not be available everywhere (in the states it's a staple for school kids not sure about the rest of the world). So I started thinking that $15 can of $2 paint must be no better than the el cheapo spray. I'd feel a lot more comfortable if GW listed what type of paint it is. I can only find enamel spray paint. Not sure if the GW spray is acrylic like their brush paints. That would actually explain the extreme costs.
I looked at other model manufacturers and they are no better cost wise - if not worse actually.
car body work sprays work well...
I have to agree with sonoftheemperor. I just got through my first can and foresee me going through a second if I can afford the rest of the army.
Rust-o-leum black primer works great. Or was it duplicolor? Can't remember, I can check when i get home but I know I heard ppl recommending rust-o-leum.
I just get a can of whatever colour I need from Halfords. It's just car bodywork primer as someone else mentioned above. Works fine and comes in a good selection of colours.