I suggest staying with a belt buckle style that your buddies and you are use to when SCUBA diving or Freediving.
For Freediving, I use a Marseillaise style weight belt (very thick rubber) with Tinman pinch weights. I paint the weights with exterior paint from Walmart/Michaels $1-2 small container art area. Camo facing outside and yellow inward (I can find easier if I drop them). Need to touch up periodically.
I keep all my lead in a bucket in the garage away from kids and animals. Same when rinsing gear, not in house or near pets outside due to lead rinsate buildup in driveway, frontlawn, etc.
For SCUBA, I use a DumpsterDiver style rubber/nylon belt with a high quality stainless steel quick release buckle. This belt can use any type of weights: pouch, coated, uncoated. Rubber belt connects to SS QR buckle webbing end. Nylon webbing connects to rubber using 2 SS belt slides. Nylon webbing goes through SS QR buckle release end.
I can post pictures later if you need them.
I am a Northern California Kelp diver. I am into comfort. If on SCUBA, I use an SS BP/W with crotch strap. I use the DumpsterDiver style belt for comfort. It is a rubber belt, but the slide portion through QR buckle is nylon. I use XS SCUBA pouches on my rubber belt, filled with shot or solid weights.
For freediving, I use the thickest rubber belt I can find. Freedive Shop, Sacramento. Hermosa Beach also has a very good shop.