To get more length just follow the directions on the back of the High Gloss bottle:
Sand it to the next grit level, then re-apply the polish.
I've done that on a few different Brunswick pearls and the results are usually proportionate. 800 grit + polish, 1200 grit + polish, etc.
If you want a LOT more length, try Rough Buff between the sanding phase and the polish application.
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"None are so blind as those who will not see."