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Hey everyone, I recently picked up a reaper bones spider to paint for my girlfriend. I sprayed it with a flat back undercoat, like I normally would, but then once it dried it became extremely glossy and sticky. Did I do something wrong? Or is their resin different than other kinds?

And for future reference, how should I paint them?

This is how.

I'm sorry to say that spray primers never cure properly. They will always stay tacky as they are made of a polymer type resin which I sorry to say doesn't really take. I used gw imperial primer on mine. I hate to say it but you will have to strip it and start a fresh.

The linked FAQ covers most of your options. My only completed Bones minis, thus far, were painted starting with the bare plastic after a thorough wash, rinse, and dry. Getting a solid basecoat took a bit of doing, but it definitely worked - densely pigmented paints like Reaper's HD line or Citadel Bases (I assume - I have old paints, so mine were actually Foundations) make things easier. Don't thin your paints much, if at all, as the plastic is hydrophobic (watery paints just bead up, instead of laying down an even coat).

I haven't started painting the most recent batch of models, yet, but I can at least confirm that Vallejos PU primer went on beautifully, both brushed on by hand and sprayed via airbrush, which will likely be the route I take going forward. It strips off easily using the usual methods, if you need to, but resists rubbing and gentle torquing perfectly and took some actual force to scratch off with a fingernail - enough that it felt like I was actually deforming the underlying plastic to do so (note: all tests performed after 24+ hours of cure time).

Cakie wrote:
I'm sorry to say that spray primers never cure properly. They will always stay tacky as they are made of a polymer type resin which I sorry to say doesn't really take. I used gw imperial primer on mine. I hate to say it but you will have to strip it and start a fresh.

I've used automotive primers on Bones and they cured fine. There is a component of some primers that causes them to not set properly on Bones and causes them to remain tacky.