.NET Remoting Security and hosting in IIS

In the last couple of days, I've suffered from some frustrating security issues related to a .NET Remoting object hosted in IIS. My current customer uses reasonably locked down development systems, and noone seems to know the real details of the security configuration. Fortunately, the article Building Secure ASP.NET Application shed some light on the .NET/IIS security model allowing me to workaround the issues.