Fretless Conversion
I can convert an acoustic or electric guitar to a fretless instrument in two ways.
Fill fret slots with veneer (Veneer can either match fingerboard for invisible look or the opposite).
New fingerboard (Requires finish touchup on neck).
See YouTube for video on how I do it.

Before Fretless Conversion

Durring Fretless Conversion

After Fretless Conversion