This is from a OT question on another forum. (Details of use below.)
The problem is finding a miniature router round over bit (or ogee bit) of
1/16 inch radius or less. Metric sizes would be OK.
A hand molding plane of small size might also work.
The original poster in that other forum found small router bits that fit a
Dremel like hand rotary power tool with an 1/8 inch shank, . A small router
table was built to house a Dremel tool with the bit sticking up. However,
when getting bits for Dremel like tool from a 3rd party, the quality of the
HSS used and the sharpness of the cutting edges leaves LOTS to be desired.
For artistic reasons (and only for artistic reasons), a round over bit is
needed for some woodworking scroll saw fretwork. Stock thickness is
somewhere between 4mm and 6mm. Length and width about hand holding size.
Needle files, Dremel rasp bits, and sanding
don't have the uniform look wanted. I looked for a manual mini-hand plane,
say something a Luthier might use, but no luck. Although, how the
mini-hand plane blade get sharpened, I don't know.
Hand made Scraper blade? I seem to remember Roy Underhill doing a TV show
about making a hand made scraper blade to do beading work. He made the
scraper profile from an old rusty saw blade. I seem to recall it was WAY
much work to hand make such a tool. (had to make mini forge to soften blade
metal, cut, and re-harden the steel.)