My technique is to confuse & bore her with all the details. For instance…after she says, “you already have oneâ€�, which is exactly what my wife said…then I jump into the differences and details. ie. Amps, orbital throw length, forced rotation, the ability to correct and burnish to perfection in the same step, etc, etc, etc…
I always make sure you use a bunch of “detailing lingoâ€�…that just bores the heck out of her, plus she has no clue what half the stuff I’m saying means. Eventually she’s just so worn down by my excitement and refusal to stop talking about it, that she gives in.
And as always…delivery and timing is everything.
Plan B is just buy it…and face the wrath later :angry. Yeh, it’s hell for a week or two, but eventually passes. Plus you could hide out in the garage with your new polisher.