my chrome wheels on my 300 sdl(86) are leaking air right after I replaced my tires. I have michelins on now and when I took the problem to the installers, they informed me that the chrome is flaking and any tire caulking they put on will not help...is this true and how do I replace these wheels, especially if any wheel that old will have the same problem. Are there replacement wheels that will fit or are the specs proprietary to that year and model?