Model weathering product from Ammo by Mig.
These enamel washes are an ideal way of adding shadows to recessed areas on your model to give it a realistic look. Product and can be thinned using Ammo by Mig odorless thinner.
Recommended that this product is applied to surfaces that have been painted or varnished with acrylic paint.
Haven’t used any of them as yet but a great name and reputation