Does anyone have suggestions on how to achieve a rough sand cast type of finish on plastic parts. I am working on 1/12 motorcycle wheels that would have a cast finish on the spokes and a smooth machined finish on the rims. Can I add something for texture to the primer? Any help would be appreciated. Thanks.
Perhaps in your painting. using a VERY MATTE enamel paint (not metalizer type) such as Humbrol, airbrushed, for the spokes. Perhaps with a rough primer undercoat. Not sure what to reccomend for the rim.
DOn’t know if it still available but there was a thinner for Floquil paints called Diosol. When sprayed on bare palstic it gave that look.
You can use Testor’s liquid cement (the brush on kind that comes in a bottle), and brush it on your plastic. Then after the surface has softened a bit, use a stiff brush (I use an old tooth brush) to stiple the surface. Depending on how much cement you use and your stipling technique, you can simulate castings of almost any roughness. The technique works great on 1/35 scale armor and would probably scale up fine to 1/12.
I use much the same technique a ABARNE, except that I take an old paint brush and cut the bristles off until the remaining bristles are about 1/8" long - leaves you with a stiff bristled brush which is much finer than a toothbrush.
Thanks everyone for the input. I used the liquid cement and a trimmed down acid brush and got just the look I was after.
This seems like a good tip. I assume it would work for engine transmissions with texture, as well?
You can also use Mr Surfacer, stippled on with a brush.
I’ve used on armour before now to create that cast look.
Karl
In the painting process, use really thin paint, crank up the air pressure so it is dry before contact. This will leave a sandy residue appearance to the surface.