I recently got a hold of some very cheap third party artillery guns that fit into the 28mm Warhammer scale and decided my Genestealer Cult needed some long range punch in the form of a deatachment of Brood Brothers Earthshaker Battery guns. You can find the models yourself on ebay under the keywords “Model, antiaircraft gun, cannon toy” and they go for about $4 a piece AUD. I purchased 10 to cover any bad casts and to also bulk out some 30k milita forces in the future or just plain old terrain pieces as well.
Painting was simple:
1: Spray white undercoat and then seal with matt varnish for better wash surface
2: One coat of brown wash
3: Once coat of Sepia wash
4: Drybrush with Bone
5: Paint metals and then wash metals with nuln oil
6: Black for the wheels with a grey drybrush over the top
I will be weathering the whole army at once when the complete force is up to the same standard as it helps me keep consistency doing it in one giant batch.