Rust for rust

[jwb]

I still agree with the OP, whose assessment of his own work seems correct to me. Rust that comes from rusty staples or paper clips is not the same thing as rust that's been out in the weather for years and years -- for that, you do in fact have to match colors with things like chalk or paint. Also, rust works its way out from under paint, it doesn't sit on top of paint like it's been brushed out of a bottle.