I would totally understand why Bob Jackson would threaten to use copyright to prevent the use of their decals on non-BJ frames. It could tarnish their name and reputation if you stuck them on some old road conversion.
Did BJ understand that you have a BJ already and are going through the process of restoring it to former glory? If they understood that and still threatened copyright stuff over the use of a head badge and fake decals, then they're being prats. If they have a problem with that they can either make them themselves or go after the person infringing their copyright, the decal maker.
Not at all.
I would totally understand why Bob Jackson would threaten to use copyright to prevent the use of their decals on non-BJ frames. It could tarnish their name and reputation if you stuck them on some old road conversion.
Did BJ understand that you have a BJ already and are going through the process of restoring it to former glory? If they understood that and still threatened copyright stuff over the use of a head badge and fake decals, then they're being prats. If they have a problem with that they can either make them themselves or go after the person infringing their copyright, the decal maker.