I need some advice from an experienced collector. This past Christmas I pulled out from 35-40 years of storage my Lionels from the early 50's, cleaned them up, lubricated, and set up a layout on a 4x8 board around the tree. Had a blast and started researching postwarlionel.com/ to figure out what it is I have. That got me to The Gauge, E-Bay, and several train auction sites. I quickly realized that there is a lot of old stuff out there and that rarity and condition (original) make a huge impact on pricing. Question: If I replace the front boiler plate (trim light broken off) and touch up the paint to fix a few dings on a Lionel Hudson class 4-6-4 steamer from 1950-1951, will that devalue the engine? I have a Lionel Rock Island 2031 Diesel set from 1952-1954 that could use some paint touch up on the white trim bands on the locomotives. Am I better off leaving them alone? I want to bring all of my stock back to top mechanical and cosmetic condition before I embark on building a new layout.