hi just got my 1999 classic mira back from its mot and acouple of things have come up ,when the headlights where adjusted there was a comment about corrosion under the the lamps and if there was a nudge or something the whole area would be damaged is this a common problem and also the fuel pipe has some corrosion and part of the exhust system does any one have any idea of cost for respraying and treatment ?? thanxs