Some modelers use glass, I use a cutting mat when scratch building.
You can find scale rulers in any scale. Since I am primarily an N scale modeler, this ruler works for me.
Rule #1 Always use a new blade for each project. Start with light cuts and take your time.
I like the instant bonding of styrene. This is what I use.
You can make anything with styrene. Any scale, any concept. You can make it look like wood, or metal, or brick
Why settle for anything other than what you want? You can build anything!