DON'T use Duct Tape. That will do nothing except damage the surrounding skin and pull any wound that's healing apart and it won't heal properly anyway because of the natur of the tape.
Also, it is too late to close the wounds now, any later then 24hrs (and once you've cleaned them well) is too late unless they've been applied by a medical professional.
If you're wanting to know more about closing a wound then I'd advise you to read
this article.