Electric Mirrors MX5 MK1

Hi<?xml:namespace prefix = o />I wonder, if someone can help me, I just bought a set of electric mirrors for a MX5 MK1 (<?xml:namespace prefix = st1 />California yellow) as I plan to re-spray it and upgrade some bits of the car. I received the mirrors, but now I need to know how can I disassemble it (as then can be repainted) and how can I installed in the car? Do I need open new holes, which type of screws to use and where can I get the gaskets to seals en gap and prevent corrosion? many thanks for the advise