How to paint red?

[Bugsda]

Plaka 23 Siignal Rot, redder than Lennin 

[Aaron]

If you want a more "historical" brick red you can try Valejo burnt cadmium red, cavalry brown, and flat red. I use a highlight of scarlet for officers. If you want a faded look, mix in some red leather and/or orange brown. I almost always prime black. It comes out looking like this:

[dampfpanzerwagon]

Just to add my two-pennies worth;

Over a Black undercoat
Blood Red mixed with some Dark Green for the base.
Blood Red for the mid coat and highlight.

I find that Red does not need a final highlight.

You can always wash with Red Wash.

Tony

[Captain Blood]

Blood Red mixed with some Dark Green for the base.

Interesting - sounds like a proper artist's trick that one 

[Froggy the Great]

Purple-black for the basecoat, then up through the Reaper MSP "Painter's-Blood" triad, if I'm being careful.  If I have a lot of redcoats, I just use MSP Clotted Red thinned over white primer and that nearly self-highlights.

[TheBlackCrane]

Just to throw another option in, I use a mix of paints, and best result I've had is usually through black base, followe dby a lightish brown and then 'cardinal red' from the FolkArt range, then highlighted by mixing a little white in with the red to produce a lighter shade. Although having seen Captain Blood's photos I think I might just go home now 

Otherwise, I've also found Tamiya acrylic hull red as a good basecoat for reds (it's nigh-on brown), although it does sometimes require a couple of coats for good coverage.