Quick 10 min Sunday Job... Odd sharp fret end and hard edge on the bitsa necks...
For some reason i came across theses 4 Way (Sand,Smooth,Buff,Polish) Fret Dressing Sponges in Superdrug... A bargain at £1.99 or 2 for £3...
https://www.superdrug.com/Make-Up/Nails/Manicure-%26-Pedicure-Tools/Nail-Files-and-Buffers/Superdrug-4-way-Nail-Buffer/p/785413
Did a Luverly job... spongy so you can crease for better shapeing, smoothed the fret ends and light-rolled the fretboard edge.