Update. I purchased the heat gun from home depot and tried it out today. Man does it get HOT HOT HOT!!! I turned it on highest temp setting and went to work on the stuck 17mm acorn bolt. I set a time for five minutes to limit the time I heated it up.

Not only did the acorn bolt heat up, but the banjo fitting and copper crush washers heated up as well. then, fuel began to leak from the area around the copper crush washers and the banjo bolt began to smoke! YIKES! I shut the heat gun down PRONTO! I was afraid I might start a fire which would not have been fun; a fire is the last thing I needed.

I'm thinking of using Hylomar to seal the area around the copper crush washers. After running the car out of gas I would be more confident in attempting this repair. Input or thoughts are appreciated........

this

http://shop.advanceautoparts.com/p/permatex-hylomar-universal-blue-racing-formula-gasket-dressing-flange-sealant-85249/7740008-P?searchTerm=hylomar#fragment-3

or this

http://www.amazon.com/Hylomar-Universal-Regular-Temperature-Sealant/dp/B00HLSUXYC/ref=sr_1_2?ie=UTF8&qid=1422321036&sr=8-2&keywords=Hylomar#customerReviews.