With regards to "but it has carbon loaded glue; that makes little sense except for stealth" - simply put nothing could be farther from the truth.
When the 229 was under construction there was a dire lack of resin wood glues to work with, since pretty much all the factories producing resin were no longer in operation. So what were the Hortons to do? Adding charcoal to wood glue is a very old, simple and cheap method of improving the strength of wood glue. I believe this is the primary, if not sole reason for the presence of carbon in the wood glue.
And to add to that simply adding charcoal to glue is not going to magically give you reduced RCS properties. The RAM materials used on stealth aircraft do have carbon in them, but it is far more complex then simply tossing some in to the mix. The size of the carbon "pellets" are carefully selected and applied to the skin in a way that ensures an equal, grid like distribution. This is far beyond just adding charcoal to the glue.
As far as Myrhas claims that the aircraft was designed for stealth, keep in mind that this is based on interviews he conducted with the Horton brothers after the B-2 became known publicly. In the years after WW2 the Horton brothers published several books, and not a single one of them made any mention of stealth in the design of the 229 or any other aircraft designed by them. Until the B-2 came out of the black that is - then they released a new edition of an earlier book with mentions of stealth and the addition of coal to the glue as an attempt at making RAM. Furthermore interviews with other engineers at Horten after turn up zero mentions of stealth. And one interview with an engineer in the 90s, when asked about the stealthy aspects of the 229, stated rather emphatically that there was no attempt at stealth with the 229. — Preceding unsigned comment added by 2620:117:C080:520:5E26:AFF:FEFE:8C40 (talk) 07:10, 21 September 2014 (UTC)