On Thu, 31 Dec 2015 06:17:32 -0800 (PST), wrote:

recommend a glass epoxy for cracked halogen light covers ?

No. Halogens run very hot and G10/FR4 will scorch or crumble. Try
sheet aluminum roof flashing. Paint it glossy white to reflect the
heat. See examples in Luxo and Ledu desk lamps and overhead track
lighting.

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Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558