"Camouflage masking techniques" Topic

There is a TMP member with a blog and he does a lot of armor, and achieves a great camo effect by base coating the vehicles, and then he applies some white foam that looks like shaving cream, and then airbrushes, I assume, the camo paint over it. When dry he brushes or washes the white foam off and gets a GREAT mottled camo look.
For the life of me I cannot remember his name or the blog site. I would like to know, what is that stuff he applies and how does he apply it to such great effect? He used to do a bunch of "DIY" posts and maybe I could pick up some tips?

Hi

I have seen people uses silly puddy for this painting trick.

Micromark sells special masking film for this:

micromark.com/Parafilm-M

Masking is a very big topic.

Sadly I have not seen the exact blog you are looking for.
But there are many liquid masking fluids on the market. A water soluble one is alluding me right now, other than cheap hairspray (more often used to achieve a paint chipping effect). Oh wait, there is this one: techni-tool.com/product/754CH048-2204-8SQ Which might work.

Most of the fluids leave a hard edge, but can be splattered on to achieve random patterns. Typically pulled off with a soft rubber. See such as:
link
link
link

link

Other camo effects are from Silly Putty, Blue Tack, Poster Tack,

And like the Parafilm, there are many Fisket Films to cover larger areas:
link
link
link
link

Pity, I may try some of the fluids, but I will keep searching, like a chubby Diogenes.