Hi Wrewster,
While it’s always possible for them to lie … they would normally just not disclose the quality of the materials rather than lie about it because providing misinformation and getting “caught” is much riskier than not providing it at all.
Most licensee brands such as Restonic are private factories that have been in business for a long time and many of them are much more likely to be transparent about the materials they use than the major manufacturers. The “bottleneck” and the most frequent source of misinformation is often a retailer that doesn’t want to take the time and make the effort to phone their factory rep to find out the information that you are asking for. There is more about this in my previous reply to you here.
Phoenix