The Hobby That Dare's Not Speak Its Name Aka Wargaming

for stippling models, tearing a bit of washing up sponge off and sticking it in a paintbrush head protector is the key

you'll want to prime your model

then select a base colour (the GW workshop is great and will tell you paint triads for their models, you dont have to use gw paint ofc, but they give you the shades you should aim for)

you want to wet the sponge and dab it till it's moist, but not dripping water or pooling on a piece of paper/ card

dip it in your base colour (i am assuming the paint is thinned or on a wet palette, if not thin it a little so it doesn't texture) and then sponge all over the model body , 2 thin coats always best

next repeat this step with the mid colour, but aim only for the center of panels/ where the light would be, you can shine a torch above to work out where those areas are, it doesn't matter about being messy, it all adds to the effect

then take your lightest colour and hit only the top of the model, the brightest edges, but have fun with it, if you think it looks cool, it looks cool

then you want to paint the weapons and metal in a dark grey metalic, all over, good coverage

then you want to pick out any lenses, eyes, screens etc, in a pale sand colour with a brush, precision matters here, but only to as much as you care

then you'll pick out any puches or leather in a mid brown with a brush, same rule of precision

then you'll want to take something like a dark brown wash or a dark grey wash paint, agrax earthshade or nulnoil for example, and pick out all the recesses and soft armour , paint a couple of coats in the deepest recesses and joints, you can also pick out panel linings if you want to break up some areas

paint nuln oil over the guns, ensuring to wipe away any pooling on flat surfaces with a wet clean brush, but let it pool in the sunken bits

adds some dark brown wash over the leather, it can pool, it adds patina, again, be as precise as you care about

then you want to reeeeaaallly thin down some red paint, till it's transluscent, and apply this over the pale sand bits and apply with the same rules as the glazes, it will look better when it dries but you might need 2 coats

then you have it! some stippled models!

for bases, break up some cork mats/ tiles/ and place them on

glue the model down

add some texture paint, really it doesn't matter how messy it is it all blends in

paint in a sand colour

add an agrax earthshade wash

dry brush with the sand colour, again who cares if you get it on the model it's patina

add a gamer grass bush

you're done!

if you want to do it in the style of terminators it's the same steps but you'll have to edge highlight, i hate edge highlighting i found out after painting those models, but it does look cool.

https://www.youtube.com/watch?v=Aht2upEfu1U

this video is good for that.