There's painting techniques I want to try when I get everything ready. But I need to get down which is the best primer for airbrushes first.

My base idea for 'spider models' is that they're not going to use my Red scheme, purple shadow and pink highlights (cartoony style). So i'm probably going with a slapchop approach with a white and gray shadow with a overlaying color like a yellow. It covers details and doesn't let detail rise too much.

I was planning on highlights tapped on by a light sponging rather than a drybrush tap for spiders, since I can pick the top end of the round limbs easily that way. Yellow may not make it past my testing but I've decided on a bright color that isn't red. So black details on the abdomen and eyes would be the finisher.

I was looking at common terrain and how people "fly through making it" and I see a lot of greys and dark tones and with all the legs would pop out and look menacing if they were a yellow, orange, white or pink model. If they were on a snow terrain, white would be out. So yellow/orange is the theme.

I'm assuming the models are too small(small parts) to get a proper color shift from the color shift paints. That would blend in the legs too much because most of them are dark or would seem dark.

So I hear about chipping, sponging, drybrush techniques. I'm looking for technique ideas to start during my testing phase.
>I will be removing paint on test models to repaint them
Someone complained I post my models too much so I'm posting a frequently in stock website that takes 1/7th the price off most of their 40k.