Honda-SOHC

Guys

OK - my tank and side panels have come back from the sprayers, but having put fuel into the tank to start the bike up, the paint around the neck opening has started to soften and crinkle (I've had this happen before on another bike). 

How do you folks who've painted things prevent this from happening - and is there anything I can do about it now?  Alternatively, is there something I can put round the neck (like a large black rubber band or piece of bicycle inner tube) to disguise the effects of the fuel on the paint/lacquer?

Thanks

Neil

Happy Christmas/New Year all.

I've just bought myself a late Christmas pressie - an imported and unregistered '72 CB450 (I know it's a DOHC - heresey, I hear you cry).  The upside is that the bike is in great condition - low miles (originally US), and apart from slightly faded paint, is pretty much complete.  The downside is that other than a dating certificate, there are no documents with it. 

I've had a look round the DVLA/HM Customs websites and have kinda got my head round the registration process, but I'm a little concerned about the import duty side of things.  There's lots of information about importing later bikes (particularly anything under 10 years old), but I can't see what the process is for older machines with unknown provenance.  I'll get a bill of sale from the dealer to prove ownership and I'm told that it came into the country through Germany, but again, there's nothing to confirm how reliable that information is.

Anyone had any experience of this kinda thing or know where I can find some answers (preferably online) - and have I just got myself into a costly bureaucratic nightmare?

Thanks for your help.

Neil