Can anyone tell me how to do shiny but opaque plastics just using IBL?

If I use it straight I get a rather flat object and no nice shiny dot.If I use sunlight as well and manage to get the sun pointing in the right direction with soften shadows it looks better but the plastic looks translucent instead of opaque.
The only work around I've come up with is to reduce the diffusion in the materials lab to get something like a shiny but opaque plastic but using sunlight and HDRI. OK for plastic but not what I want if I'm using any other material and HDRI.

So has anyone else encountered this and how did/have they overcome it?IF they did.