Dear Schnorrer,
I have a good aquiantance who I am very fond of, except for one glaring fault.  How do you tell someone they smell bad?
Pepe

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Dear Pepe
With a name like Pepe, I can tell you are an expert on the topic of smelling bad.  Only kidding.  Unfortunately, with a name like Pepe, I doubt whether you can TAKE a joke.  Only kidding.
Now as to your friend: one tactic is to present your PAL with the gift of cologne.  A deodorant would be much too obvious so opt for subtleties like scented candles, witch hazel or incense.

Another tactic would be a verbal approach.  Ask your friend how he would deal with the same situation.  Maybe he will get the hint. I know I did.

Yours well scented

The Schnorrer