One of the great myths that I spend time trying to persuade newer modellers to stop believing in is that those of us who have been at it a while approach a task and simply get it right.
It's not true. The main difference is that we know we're going to mess up so don't launch in to the final project without a little bit of preparation.
A little test piece can be a great way to try out a new material or technique. If it goes wrong, the piece heads to the bin and we try again.
I'm clearing up my work area at the moment and here are a couple of pieces that are now in the bin. As you can see, I've been testing different track weathering ideas. Not all have been successful, in fact my favourite is Wico brown emulsion. It's worth using doing the test just to find that out...