Unless your bike is brand new, one of the most common areas that give away its age is the condition and vibrancy of plastic trim components, especially the black trim. They tend to fade to a dull grey ...
When buying baseboards in the past, you only had just one choice: natural wood, usually pine or hemlock. Now, the choice of materials for baseboards and trim has expanded to include MDF and plastic.
Speed squares are a helpful saw guide for cutting 45- and 90-degree angles. The plastic squares are thicker than most metal ones, making them a good fence for the shoe of a circular saw to ride along.