Hi everyone , new to forum, but not new to forums. I am a radar detector hobbyist and have some knowledge of how radar works. Specifically and to be on point and productive, here's my question(s): First, are there any materials readily available to general consumers that will readily absorb X, K and Ka band radar? For example, I am looking for a material such as a flexible foam or sheet material that will absorb 33.8, 34.7 and 35.5 ghz radar ? Ka is considered wide band and X and K are less wide. I have searched and done my homework, but many of the foams only absorb a certain band of K Or Ka radar. They don't do the whole spectrum. Eccosorb is one such material. Second, regarding a radar horn ( receiver) , would it be possible and/or beneficial to either polish the interior of the horn with a Dremel to reduce attenuation of the signal the horn receives OR gold plate the interior of the horn to retain the signal captured. Thoughts? I am not an EE and just a hobbyist with some questions. Thanks in advance.