:: HOW TO...
DISCLAIMER: fiatcoupe.net can offer no technical support apart from these "How To..." pages. Neither can we accept any liability. Accept all these guides as illustration and remember you should always know what you're doing when you're working on a car.
Brakes and wheels
Engine bay work
» Some easy work
:: Some easy work
:: Refurbishing petrol filler cap
At the left are the before and after photo's of my fuel filler cap. There was a large amount of "corrosion" visible on the surface of the cap - this turned out to be mostly peeling laquer. The solution ? Read on :
After removing the filler cap assembly from the car (held on with 3 bolts) and removing the lock assembly (although it can be left in place - I just like taking things apart !) I got to work with the Nitromors paint stripper. This removed a large amount of the old laquer, and the rest was finished off with a good going-over with fine wet 'n' dry paper. This dulls the surface of the filler cap (removes the shine), but don't worry - it'll be shining better than ever soon ! Once you've gone over the surface with fine wet & dry paper and removed the old, peeling laquer and any surface irregularities It's time to get that shine back. Remember, first, that the finer the grade of wet & dry (used wet) the easier the next stage will be. What's needed now is a good polish to get that shine back. I used T-cut (follow the instructions on the container) and a fair bit of effort and patience. Keep going until you have the finish you want (see the photo's if you don't believe it's possible !!).
At this point I resprayed the filler cap with a coat of clear laquer, but I would advise against this. The shiny surface is not good for the laquer to bond to and you'll find it soon starts to peel off again. Better instead to apply a good layer of car polish, or wax and then re-aply every couple of months - as you see necessary.
Hope this helps to return your filler cap to it's former glory. It's worth the effort and shouldn't take more than an hour or two.