How to hide any fields on mails attached to mail (like message/rfc822)

[debecio-debian]

As the subject, I wanti hide (and colorize) any fields in e-mails attached to 
an e-mail. Why mutt not show it like classic mail?
Thanks

P.S.: with 'v' I see emails with header too (some friends when press 'v' see 
email attacched without header)