Finally time to post the 'after' pics to my purchases now that everyone is in their Sunday best.
First the family photos:
My original plan was not to do much to the no. 4 since, but I discovered the flaking finish on the tote had to be removed for comfortable use, so of course the knob had to be done to match. But then they looked out of place on the plane so....
This little chap deserved to have TLC expended on him as he'd had a bit of a rough life, clearly been dropped at least twice and bit by bit the entire litany of problems came to light: the heavy rust first and foremost, also a grooved sole, broken tote, a bent iron and a small crack on one of the cheeks.
And one rare one: a replaced adjustment screw. I was done fairly crudely and naturally it's normally threaded, so adjustment will forever be the reverse of what's expected. As a result the obvious thought is to turn it into a roughing plane since that'll mean the iron rarely needs adjustment, it appears the previous owner had the same idea as the edge was heavily cambered. Not as narrow a radius as on some dedicated scrub planes but enough that the centre projects while the corners remain unexposed.
A reminder of how rough it looked initially:
And how he's looking now:
Honestly the flash makes it look a little shinier than it really is in the hand, but I did buff every screw head and all the brass, and since I had the Y-lever out to modify it slightly that too. In for a penny in for a pound!