When doing touch up on paint, I like to use a paint like DeRusto or
Rustoleum as a primer and do it in the closest color I can to the finish
paint. This way I can fill holes where needed with this anti-rust type
paint and it will stick to about anything and is easily painted over with
regular bike paints. I recently discovered that Ace Hardware stores have
their own brand of anti-rust paint. They call it Stop Rust. To cut to the
quick of the matter, they have a color in this paint called Aluminum that
even in bright sunlight is a perfect match to Cinelli silver and has all the
nice qualities of an anti-rust paint.
Not only that , but it is not at all expensive.
Tom Sanders
Lansing, Mi USA