Done it a few times myself. Its pretty easy to do really.
Click me:
Farnsworth's Flame
Is a link to my car when I did it.
Notice how I had the whole car stripped, but went back with the side trim on the doors and body. Yes...I could of welded shut the holed they leave behind, but realized the facts...many people out there are a-holes and do not watch their doors. One door into the side of my car would be all she wrote. Door dings stick out as bad as somebody taking a sledge hammer to the side of your car IMO. I knew it would be cool...but in the real world not worth the risk.
Glad I went with my decision to reinstall them.
And did another lid up for a local cause he was getting a different spoiler and couldn't locate a SE lid or a willing owner to trade with.
I only took care of the welding and filling and prep work. He had his paint guy paint it to match.
You just have to take special care to prep the metal before during, and after you weld and also take care not to let it heat up too much or it will distort the metal baaaad because this is thin gaged metal these cars use today...not like the thick stuff they used to use back then. But since your having a professional do this...he will already know how to do all this anyways and know what to do and watch for.
~F~