I have used WEED & FEED on the lawn and some has unknown to me got on the block paving of the driveway. The drive has got wet and it has left brown spots on many of the blocks - how can I remove these marks ?:confused:

Can you just flip the blocks over? Try Whink on a spot, this could be rust from iron oxide. Whink Rust Stain Remover (http://www.whink.com/rust_stain_remover.htm)