Heavy Rust Help ?

Wow,that's some advanced technique,Mig Jimenez does that 3-D peeling rust.Maybe try to Google his trechnique.I can do some textured rust by stippling on some Mr Surfacer 500 and painting it a rust color,but not as advanced as your example shows.

Thanks Tojo,

I Googled Mig and saw a couple of vids on Youtube that may help me. 

One neat thing is that there are model paint vendors with different shades of rust.  If you use a couple of them, the effect is better.  Or, it is easy to change color of rust color paints by adding another color.  No need to get the color exact to anything- rust color does vary.

That effect completly blows me away. I know what to improve next.

I'm gonna say a combination of liquid masking for the sharp peeling, hair spray for the genaral soft edged effect, lots of washes and filters for the fading and subtle rust shades. Salt masking can create some fantastic effects. I have used rust colored paint and while wet sprinkled ground rust colored chalk for a rough texture. This method is very convincing specially on tank mufflers. Streaking can be esily done with thick artist oil paint draggegd down and blended. 

I have quite a bit of experience with general rust, but nothing like the 3D on that example.  My go-to is MM Rust as a base paint and adding black to get different tones as Don says.  I also use Grumbacher artist oil paints in Raw Umber, Burnt Sienna, and particulalry "English Red".  The oil paints are used as "Filters" drawn down with mineral spirits.  Less is more with those. I have a thing of Mig old rust pigments, but I don't have the acrylic bonder for those.  That Mig Pigment bonder/setter is like $15 a bottle.

I think that a chipping solution may work for the 3D effect. With some pigments added for texture. 

One interesting thing is that many paints of about rust color actually use an iron oxide which actually is rust.  Mineral iron oxide is very widespread as a mineral, so it was long used as a cheap pigment for red paint, even when it was for things other than duplicating rust on a model :-)