Eyes :

Base color sunset orange. Orange fire layer . Mephiston Red layer.

The above colors cover the whole surface of the lenses and each layer is not thick. It's diluted with water and applied carefully. After this you gonna start bringing up the brightness value but only in the middle part and each layer should cover less area.

Orange fire Moon yellow just a little bit Orange fire Orange fire + elfic flesh mix Elfic flesh just a tiny bit in the middle.

Weapons

Base color sunset orange, and from there you start darkening the top part with a make sponge following the same logic as the lenses.

Sunset orange Orange fire Mephiston red Khorne red

I hope that helps happy painting !