I like the idea of wrapping them up (even partially), unlikely I'll do it but a great option.
I've used vermiculite before
but I don't now - so, I've been running around 70/30 Coco and medium size perlite for awhile.
Though there's a few bags running with recycled sphagnum peat in them it's probably not enough to give consideration to. I don't use promix for the cost factor, but I am a self professed cheap sunnuva.... too.
If many of the posts you see about problem children (and we ALL have experience with our own) in the various subforums are having issues, you can also read plenty of them are running 1)PM HP as well as assorted 2)RTU store bought mixes and 3)Coco.
Even if you blindly were to say that 33% of the three named type are equal offenders of the amount of problems - as a blanket statement it can stand on it's own because each selection can fall to inexperienced hands with any mix.
IMO if you know what limitations you have and stay within the parameters of said media, you'll do well and I will tell anyone here that Coco has been a pain for me more than once and it'll happen again. But for the cost factor and the properties (when amended like everything correctly) can get great results also.
I'm not new anymore
but I have only fallen asleep standing up a few times in my time here, on this planet...
One time was within the past ten years or so, and the product was a poly thing that's been long gone with the guy that brought the dank.
I've seen several iterations of the names and spelling of a plant that appeared to be around 50/50 or 55/45 to the sativa side none I've seen are it.
Jack's hammer was the name and I took a nap after the man fed me some fresh scissor hash, a full wooden old skool bowl of it.
I enjoy reading about the various challenges in all kinds of mixes and try to pickup on a new thing or two when I can.
Oh for the record the only time perlite floats around here is the first wetting and if they are happy they'll have the top layer locked up with roots right shortly!