I have a brush with real pighair, its the best for the coat, I use it if he's with a short cut, and with long hair, always, Its really good using it when I blowdry them, the coat gets dry sooner

Then I use a steel comb very much when I'm putting a plastic band in his hair
If he has short hair, you dont have to brush him much, just now and then brush with a pighair brush over the coat , it makes it more shiny, I also spray all over him a spray on conditioner after bath, no matter if he has short or long hair
I use Pet Silk coat products on him, I think it works the best

I dont like Bio Groom,If i use it I have to bathe him twice more often (twice a week instead of once a weak) it doesnt clean the coat well.
I use Pet Silk Rainforest shampoo, Pet Silk Rainforest Conditioner, and Pet Silk Rainforest Leave-in Conditioner (i use that for mats, and before i brush him i spray that on him, I mix it 50/50 with water when I just spray it before I brush him, on matts I use it straight from the bottle, no mixing).
I think it works the best! I also love Pet Silk Mountain Berry, sometimes I use Mountain Berry and sometimes Rainforest