Cleaning concrete splashes

[CaptLimey]

Anyone know an easy way to clean concrete splashes from painted metal? My newly acquired 2003 Benford PS 3000 dumper needs a new paint job but, like a lot of dumpers, the front axle and wheels are covered in concrete from splashes when tipping. Is there a more efficient way of removing the concrete than the 'chippy chippy bang bang' hammer method? For example is there an acid (hydrochloric?) or other chemical that will soften or remove it? Any advice gratefully received.
Rgds CL