matt_southward":1zpbc3qa said:
I just bought an old brass soled rebate plane off eBay and as its my first I just wanted to double check grinding angles before I refurbish the edge. Do these follow the normal(ish) convention of a main bevel at 30° with a 25° secondary? Or are they treated any differently?
What you describe isn't normal(ish) at all. All the old rebate planes I've ever seen (and subsequently sharpened) have a rounded bevel with an edge about 30º. They are narrow and are honed only - no need to grind unless they are chipped etc. I'd expect your new plane to be the same unless it has been got at recently be one of the new (misinformed) sharpeners.
I've never seen one with a double bevel, let alone hollow ground. There would be no point at all - just sheer ignorance.