Thursday, March 19, 2009
The pictured objects were actively corroding after the flood. To slow that process we put the objects in sealed containers with silica gel packets. The dessicant pulls in moisture so it doesn’t permeate the objects.
Now we are trying to clean up the effects of the corrosion and stabilize the metal so that the objects can be put on display and preserved. To begin with, we take small knives (carpenter’s marking knives or exactos) and carefully scrape away the flaking rust spots. Some of these objects were painted so we must be careful not to disturb that while we are removing the rust.
Once the large areas have been scraped a brass or bronze (named for the bristles) brush is used to begin to even out the surface. A couple different weights of steel wool are used and finally a coat of oil which is rubbed into the metal with a fine grain steel wool.
I cleaned the drill bit last week, it took about 4 hours and the coils were very hard to clean. Looking at it now it doesn’t seem like the same object, It is amazing the difference in the condition. It is tedious work, rivaling the basket cleaning, but there is no saliva involved in this project!