Model railroad layout painting and weathering

What tools and techniques can I use to paint and weather tunnels and bridges on a model railway?
How can I paint and weather miniature figures to add life to my model railroad layout?
What are some techniques for painting and weathering rocks on a model train layout?
What methods can I use to weather wooden structures on a model railway layout?
How can I create realistic rust stains on model railroad structures and vehicles?
What techniques can I use to weather metal structures on my model railroad layout?
What are some tips for painting realistic water effects on a model train layout?
How can I weather my model railroad layout to represent different seasons, such as snow or autumn leaves?
What are some ways to create realistic chipping and peeling paint effects on buildings and vehicles?
What are some techniques for adding depth and dimension to painted scenery on a model railway layout?
How can I achieve a faded paint effect on model railroad structures and vehicles?
What tools and materials do I need to weather my model railroad layout effectively?
What are the best methods for weathering track and ballast on a model railroad layout?
How can I create realistic graffiti on my model train cars?
What techniques can I use to create realistic mud and dirt effects on my model railway layout?
What are some tips for painting tiny details on model railroad locomotives?
How can I weather buildings to look weathered and aged on a model railroad layout?
What types of paints work best for painting model railroad scenery?
What techniques can I use to weather rolling stock on my model railway?
How can I create realistic rust effects on my model railroad layout?