If you haven't already, you might want to pull up your carpet by the firewall and check out your floorboards. If they are starting to go it still might be in your best interest to do a full fix. On the other hand if its not too bad you can probably get away with the temp. repair. You just don't want to let it get bad enough to where it starts costing you money on other repairs. Mine is a daily driver so rust makes me paranoid.
Good luck!
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66 Tahoe Turquoise Coupe
Laser Red 96GT Ragtop
Both are slow but easy on the eyes!