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Use a stiff sharp scraper to remove the beads from the frame.
Starting midway along the bead on the line arrowed in the pictureCheers for the advice. I tried last night with a painters tool but got nowhere - The tool was too thick and that beading was on tight!
pifko-
There is a knack to it but it helps if you spray a bit of window cleaner or soapy water on the rubber seals. The pressure of the compressed rubber keeps those plastic pieces locked in a channel, you need to push the plastic piece towards the panel and lever them up slightly. Once you've cracked the first bit it's very easy
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Anything with a double beveled edge is likely to damage the bead or frame, as it's the leverage of the single bevel sharp edge being of to one side that's needed.
Properly sharpened like a chisel, a painters tool should work, but they are a bit too wide for some of the really tight beads. It may come in handy as a second knife if the bead keeps snapping back into place.
Have the flat face of the knife towards the panel and press/gently hammer it into the non existent gap.
It may only go in a mm or so and probably not free the bead at that point. Then use the heel of the bevelled edge to lever the bead hook free. Use a second tool to work outwards if needed.Some of the flat angled beads are bastards.
Airhead
user69121
You will need to find the thickness of the panel to get the correct one. It's probably 20mm, 24mm or 28mm.
Being as it's going anyway, unscrew the catflap and get access to an edge to measure.
Use a stiff sharp scraper to remove the beads from the frame.
Starting midway along the bead on the line arrowed in the picture