Martin Oostrom
Depends on the look you're going for. Dusty, get a tan colour. Rusty, get reds and browns and oranges. Just a bit of highlighting, light wash over very dark paint and dark wash over lighter paints.
Weathering is all about layers. Work from the background to the front. Just like Bob Ross did in his videos 😉
YouTube is your friend and if you like it in print and parting with your money, Ammo has some decent publications.

Remember! Some weathering products might affect your paint! Choose the right product based on solvent/acrylic/etc.

Martin Oostrom
Take a peek here: youtube.com/playlist..;si=8DEKwUtcyFzADX0h

bossy122
Yes, YouTube is definetly your friend for modelling tips....especially weathering.

Dave Kubizna Author
Thank you for the information. I watch a lot of youtube videos about modelling. I just get a little overwhelmed with it sometimes is all.

Martin Oostrom
In that case, get some cheap plastic and a tube or two of cheap oil based paint. Perhaps use some spoons and start experimenting. Paint the spoon, and weather with the oil paint. You can streak the oil paint with some (odourless)thinner. When you're done or not happy, apply some more thinner and the oil paint is gone. Start fresh.