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How well does super glue bond to painted surfaces? I have a Space Marine that is painted with Citadel base paint, and there is a flat surface on the power pack that would look great with Purity Seal. I'm sure it will work, but I just wonder if it is a good solid long lasting bond?

Cheers!

Holding paint to paint? Perfect.

Your problem is your paint holding to the model though.

Why not just use plastic glue? It should eat through the paint and give a much stronger bond.

Of course, we are only talking about a purity seal here, so I can't see it being a massive problem

Nope. The paint will break off with the glue stuck to it. Just scrape the area up where the purity seal will go. You only need a small spot.

Okay perfect, will do just that. I should have thought of that, only need a small spot for adhesion. Thanks all.

The plastic glue works by melting and fusing the plastic. Acrylic paint is water based and as the moisture evaporates it leaves the acrylic behind (acrylic being a plastic). The glue will melt/fuse the paint layer to other plastics but the paint still needs to be bonded to the plastic beneath it.

That is why it's better to scrape away the paint in a small spot. You will bond model to model instead of model to coat.

The best practice is definitely to make a couple of little scratches. Another possibility is to put on a teenie piece of masking tape before you start priming/painting where you know you're going to have an attachment.

On the other hand, I often just glue little things like belt pouches and purity seals without scuffing it up. Since you don't really handle those pieces, it's not a huge issue. There is also the added "benefit" that if you wack the purity seal by accident, there's a chance you'll knock it off without damaging the underlying model or paint nearby -- meaning that you can just superglue it back where it came off. If you have a really good bond, there's a chance that either you'll tear some paint, or more likely, break the purity seal. I've had this happen on Dreadnoughts that come with the really long ribbony purity seals.