I wonder if adding gluten to plaster would minimize cracking?

i'm thinking of donating my layout to our local senior center in hopes of keeping the history of modeling railroads alive.  any hints on how to make that happen?  plus it will clear up space for me to create another module.

is block sanding and polishing ho track, once it is secured in place, a good idea?  I see sun glinting off of well used REAL rails, so it might look good.  I wonder if connectivity would be better?  the clickety clack being silenced would leave ear room for dcc sounds.

i wonder if there are cameras available for monitoring hidden track operations?  Thx.

is a return loop possible with two controllers?  gaps could allow 2 power packs, one for each power need.

I  wonder if dielectric grease would double as flux.