PRB Base coat advice

[Skimtech]

Hi, I'm on a rendering job at present, and was considering applying a sand/cement scratch coat and a PRB base coat as the float coat with sponge float finish over 10mm beads or

 

[Stewie03]

Why not just use ocr if your doing a sponge float finish

 

[Salfordspread]

Why not just use ocr if your doing a sponge float finish

I thought that tbh