You'll probably find that it's just a matter of literally giving it a pull away from the body (no heat involved). You'd be surprised, it's most likely what they would do if you took it somewhere especially with exhausts. Sometimes the only way to fix little annoyances is to get brutal (but gentle at the same time).
I've been there first hand adjusting doors to line up on $80,000 + cars and trust me, if the owners could see, they would be horrified. But end result is the same as long as you know what you're doing.