I am looking for information on loading tires with ballast. Particularly the types of ballast and how they can affect the rims, tires, valve stems, and environment. I know that Calcium will eat the rims and must only be used in tubed tires. I have heard that windshield washer fluid and/or antifreeze can be used. Do they have any negative effect on the items that I listed? I have read good things about Rim Guard. It is a bit pricey for my needs and I would like to do the loading myself. I have a 1949 Ford 8N that I basically use for plowing snow in the winter and mowing fields in the summer. I am trying to find a balance between the two. Namely enough weight the stop me from sliding all over the place in winter and not too much that I will get swamped in the wet fields in the late spring. Any information would be greatly appreciated.