I recently ordered some more Purity Seals from Forgeworld.
What I do like is the act that they are easy to cut out and use. I know it is possible to make your own using paper and Green Stuff, but for quality and ease of use, these Forgeworld ones are a winner for me. Oh and you get the skulls as well.
Having finished most of the metal bodywork on my Grey Knights Landspeeder I went and painted the purity seals using a Foundation Paint.
It covered the black undercoat really well compared to normal Citadel colour. There are quite a few on the model, I used the resin purity seals available from Forgeworld rather than make my own. You can make your own using paper and green stuff for the seals, but the Forgeworld ones are much easier to use and I think much better than I could do.
When I was editing the photographs for this blog entry I was quite pleased with the way the metal finish appeared (in close-up) on the Landspeeder body.
This was done with Boltgun Metal. I still need to add some highlights.