QSC PLX2402 2400 Watt 2-Channel Power Amp Anton Becker Trumpet appears to be rusting

Trumpet appears to be rusting since the "silver" is fading to a brassy look in some spots

for this reason marked as is

the other does not

but nothing that breaks through the finish

QSC PLX2402 2400 Watt 2-Channel Power Amp Anton Becker Trumpet appears to be rustingNotes Specifications: Watts Stereo Mode (both channels driven) 8 ohms 20 Hz 20 kHz 0. 03% THD 425W 4 ohms 20 Hz 20 kHz 0. 05% THD 700W 2 ohms 1 kHz 1% THD 1200W Watts Bridge Mono Mode 16 ohms 20 Hz 20 kHz 0. 01% THD: 850W 8 ohms 20 Hz 20 kHz 0. 01% THD: 1500W 4 ohms 1 kHz 1% THD: 2400W Noise (20 Hz 20 kHz): < 1. 8 dB Input Sensitivity @ 8 ohms: 1. 5 Vrms Input Sensitivity @ 4 ohms: 1. 3 Vrms Output Circuitry: 2 Step Power Requirements (1 8 power pink