Magic Fluke have officially stated that it is ill-advised to remove the plastic fretboard yourself.
They have said that the reason is because of the special adhesive they use, which according to them is not able to be softened by heat and is likely to cause damage to the underlying wood of the neck, as well as bubbling of the satin finish on the neck.
Additionally, due to the amount of heat required where the fretboard goes over the top by the sound-hole, that you are likely to also melt the body of the instrument as well as compromise the integrity of the wooden top.
Likely Magic Fluke Company has the proper solvent for the glue they use, and I know for a fact that they have done fretboard replacements/upgrades, upon request (at a small cost), for over a decade.
My advice is to at least call them and speak to Dale or Phyllis (the owners) and see what they say.
by Magic Fluke Company web site said:
Open Monday through Friday, 8 a.m. - 4:30 p.m. (off-hours and weekends by appointment)
Stop by to see the factory at work and browse our retail hallway. We have several instruments available to play and purchase (firsts and seconds), as well as an extensive selection of ukulele songbooks and accessories.
The Magic Fluke Company
292 South Main Street
Sheffield, MA 01257
(413) 229-8536
sales@magicfluke.com
source:
http://www.magicfluke.com/Contact-s/1844.htm
Otherwise, if not, you are not going to be working with full facts and information, and if you proceed on this path of DIY and hack your way, I would caution you that you are likely to be greatly disappointed with the process, and might end up having to scrap the entire instrument.
Maybe they will tell you how to get it off, or ask you to send them the radiused fretboard, and let them install it for you.
I would think since they are the experts having built these instruments, since they are willing to do custom work, and really go the extra mile, the best outcome will be by involving them in the process, and even if it cost a little bit of money, the end result of them doing the work would be perfect, unless of course you have lots of luthery experience and have done this kind of task with great skill, finesse and expertise previously.
Just my 2 cents. Hope this helps!
You can find out more about Magic Fluke Company instruments in the mega-thread by clicking on the FAQ link in my signature below.