Low-frequency plosives aren't hard to mitigate, because they're well below the fundamental frequencies of even a baritone vocal. Any EQ can do it, even if you have to stack filters to accomplish it. Using a spectrum analyzer, identify the lowest important frequency in the vocal track. It might be as low as 200 Hz, but your plosives are probably below 100 Hz. Fixing it will only require a 48db/octave slope starting at 200 Hz. If your EQ can't do 48, stack two 24db/octave filters atop one another.
Sometimes, though, low-frequency pops will have harmonics that extend up well into the vocal frequencies, so that even after filtering out the <100Hz stuff there's still an audible artifact. In that case, a multi-band compressor (e.g. Sonitus Multiband), dynamic equalizer (e.g. MDynamicEQ, my preference) or broadband compressor with a sidechain filter (e.g. Pro-C) can save the day.
With any of these methods you can usually be very aggressive in suppressing pops without hurting the performance, since the meat of a vocal track is in the 700-2000 Hz range.
Now, if the singer was really blowing into the mic, there's also a chance that the track is also distorted. If you just can't get rid of the artifacts no matter what you try, look for clipping. If the track is clipped, then you're screwed. Tell the singer to do it again, or live with a bad track. Or go all in and throw on some more heavy distortion, call it an effect.