They make the process of defretting seem pretty easy and straight forward.
Never, never, never will it be that easy. PTBO, it's like this:
To lift the frets, you need a tool that's hard and pointed. I used the awl on my Swiss Army Knife. Very, very carefully, pull the fret out at an upward angle, like opening a door. If you try to pull the frets out through the fingerboard like a train through a tunnel, it gets ugly. The fret tange will make a larger tunnel.
After filling the fret slots with Plastic Wood, a product we have here in the US that should have an analogue in Europe (Bondo should be OK), the fretboard must be dressed so it's hard enough to resist string vibration.
If you're planning on using flats, urethane should do the job. The more liquid you can coax the wood to accept, the harder and better it will be.
Roundwounds should be met with several coats of epoxy, the harder the better. Inquire at your local crafts store.
The method of fixing frets into their slots with epoxy was first used by Roger Sadowsky, as far as I can tell, and hasn't caught on to the point where $100 broomsticks with an F on the headstock would use it, as it adds time and cost to the process of fretting.
There's no easy and cheap way out...I defretted a bass similar to yours without doing it right, and you don't want to know what it sounded like. It can be done, but softly, as the Bard might say.
