Sonnys mane is huge and very coarse and wiry-as a Percheron X he has the big crested neck-for 1st show-(game show)-would it look better braided or braided then let out to be wavy? He has one big chunk that falls to the wrong side,
I say go for the braiding if it will braid nicely, braiding gives off the impression that you tried your best to make your horse look nice so go for it!
Lol. I'm guessing by your use of the work 'braiding' that you guys are baised in america?
In england we usually refur to it as plaiting. Theres great tips on how to do really smart plaits (a must have for shows I feel!) on a website called horsehero.co.uk theres vedio guides to plaiting, in the vedio library I think :)