Is metal rust bad for veg garden compost? 2 The_Question asked: I want to build a compose bin using a metal drum. I am troubled by the question whether or not rust would be bad for compose. Try our best to ensure the garden is organic and free from pesticides and other harmful substances. Green Living Tags: garden compost, Harmful Substances, Rust Filed under Do It Yourself (DIY) by admin Bookmark This and Spread the Word! Facebook Google+ Twitter Pinterest Email Print Delicious Digg Fark Google Instapaper LinkedIn MySpace Newsvine Pocket Readability Reddit StumbleUpon Tumblr Yahoo!