I have just recovered my softop boot with MBTex. If you are just painting, you dont really need to remove the whole leather trim. Instead, you can detach the trim around where you will be painting (the rear of the boot) but leave everything intact at front of boot.
Just lift the boot and look underneath. There are about 10 or so "twist" attachements which protrude down thry the boot. Carefully untwist these about 1/8 turn and then push them up thru the boot. Now from above, lift/peel the leather trim, notice there is metal reinforcement glued to the leather, just leave the leather attached to metal and pull the whole thing back far enough to paint
Mike McMahon, Baltimore MD
1970 280SL 4-speed manual
olive green ext, bamboo int