Firewalling throttles (oops, thrust levers...) should not cause short-term damage to modern engines - the acceleration fuel schedule is computed irrespective of throttle position in all fuel controls that I've worked on for the last (expletive deleted) years.
Granted, this technique may not be the best for long-term performance preservation (fuel burn, turbine temp. margin), so the accountants may not like it - so if that's an accountant sitting next to you -
