I like to trick a person for a split second into thinking it’s real,and every little thing that builds to that is worth trying to model, weather allows you to get away with blue bloody murder, a damaged wagon can be incorporated, and once the clean shiny plastic is dulled and transformed it is one of the best upgrades there is in my opinion
I love your thread, seeing others technique, and how tos, thing to copy to twist and play with.
We get rid of low grade aspects and attempt to fool replicate the natural aging process
the first item I tried, it scared the heck out of me, i thinned the colour for the airbrush loads so I did not block it up, and I was totally impressed with my upgrade, yeah yeah you laugh but we all start somewhere I was just more cautious than many.
I was so pleased I had my first crack at graffitti the wagon is rubbish, no such wagon exists in real life, I paid 6 pounds for e wagons, and they gave me the courage to try more.
Now I got ridiculed in some places, and in other people made the effort to give me decent advice.
1. Find a decent copy of a real wagon, and identify it
2. Find a decent reference picture, one that preferably is the correct model, and has weathering that you can make a reasonable attempt to imitate.
3. for me as a UK, English modeller I found an excellent online source of wagons, then tried to identify the ones I already owned, then look through for samples that I wanted to attempt.
4. in some cases kadees have been u;dated to better looking ones and in some cases not and usually I try to hide those.
Having tested on sonething cheap that I could afford to go wrong with gave me the opportunity to gain confidence
Some of the best things is to do are
a. Look at the colours that worn wood go through
b. Look at the colours that rust goes through.
c. Look at the ways colours fade
a. Fading wood,usually loses a paint cover first, but paint or not starts off as some shade brown and then turns gray, or grays, I personally find that a Matt black acrylic mixed with a white can end up with a wonderful variety of grays, no this shed shows the idea as I do not have an appropriate wagon to hand
Before
after
the wood texture on the shed is a total bonus
b, rusts are appropriate to the metals that oxidise/oxidize
in my experience the most often seen rust in Railway tends to use orange browns and browny oranges with a nice thinned oily black finish
reference material covering a variety of examples
water can even transfer the rust into the wood grain
paint and rust both flaking