Boom regrip the easier way with heat shrink.
I started with a NP X9 180 to 230cm carbon boom. Grip had started to peel in spots & get "daggy". started off with new Stanley box cutter blade.
Remove everything off the boom including harness lines, adjustable outhaul cleats etc and the clips on the end of the boom arms. Starting from head of boom slice off the old grip in approx 1cm wide strips. Yes its long and tedious but unless you want to have thick boom grip its worthwhile.
Be carefull as on carbon booms there will be small areas that have not been "wetted" out properly and the blade may catch & lift bits of gel coat.
Once you have got the thickest of the boom grip off it gets easier.
Use the blade and run up & down the mostly cleaned up areas temoving the old glue & small bits of residue grip. This takes awhile depending on how clean uou want the boom.
Once you are happy with the outcome use some 800 grit sandpaper and give both boom arms a light sanding.
I used some sports strapping tape (about 3 or 4 dollars at a chemist) wrapped along the boom arm for a better grip for the heat shrink. The heat gun warms up the glue on the tape and gives a good bond for the rubber heat shrink.
I used 40mm heat shrink tubing which you need if your boom has thicker sections at the end of the arms like NP & Severne.
The tubing will slide over the arms easily. Slide it all the way to the front of the boom arms.
It comes in 1 meter lengths so you will need 3 lengths on this size boom.
Using a heat gun on medium heat (if unsure test on a smal offcut if possible) start from a distance of approx of 15cm and go SLOW. move the heat gun back & forwards until you see the grip start to shrink.
Be sure to go inside the boom arms to shrink the whole tubing.
Work your way down each arm making sure that each 15 to 20cm section is "tight" on the boom arm. Its easy to feel if it isnt.
I used black electrical tape to seal the grip at the boom head and end of the section.
Install all your bits back on and hey presto. A smick looking hard wearing boom grip.