For stripping chrome, I've found that Castrol Super Clean (aka Purple Stuff) works well. On some older stuff, you'll need to use Easy-Off once the chrome is gone to get rid of the laquer that is o the plastic.
As for Mack Gold, I used Tamiya Gold Leaf X-12 on my 1975 Mack R685ST; and it's pretty close. Well, close enough for me.