Re: 2003 Grand Marquis carriage top remove
Most of the ones that I have seen are glued on over the factory paint. As far as there being holes under it, it depends on who installed it; some have holes drilled to hold the chrome strip down, and some are just held on w/ glue. You could probably very carefully pull up the chrome strip a little to see whats under it, and if there's pins, put it back.
1996 Mercury Grand Marquis GS ~89,000mi, Willow Green inside and out. It's very green.
1998 Chevrolet Malibu Base V6 187,000mi (sold)