Filters as in thinned out paint.
I see MIG and AK has filters for sale. I am just coming back into modeling , while i am out of work, and have plently of oil based paints in tubes.
What is the basic idea for what color to use?
I primarily built Late war WWII German armor.
Thanks
Marc

Hi Marc,
You're right, if you have tubes of oil paint and a can of mineral spirits, you can make your own filters and washes, among other techniques.
A filter is very weak, about 5 - 10% paint to 90 - 95% thinner, and is used to lightly and gradually tint a panel (like a side armor panel, a glacis plate, or a shurtzen plate) or object (like a hatch, ventilator, or plate) To highlight it or just to add dimension and variation to the finish. It is best done with a brush, on a flat finish, so it stays where you want it. Colors are up to you, since you are just tinting the area. Yellow Ochre, Sap Green, Prussian Blue, Raw Umber,and Cadmium Yellow are all colors you can use on a Dunkelgelb tank. Experiment on an old model and see what you like!

Make sure your base colors are acylic. On my return to the hobby I found out the hard way. Have fun !