Normie,
I have built aprox. 22 Titanics in the past 15 years. The best match is
Monogram-Humbrol #7 and a matt finish #49. Mix each 1/2 oz. tin together and add 10 drops of acetone to thin. This is a 99.9% perfect finish and shade.
Which version or kit are you building? IF you have the "older" minicraft kit in 1/350th. scale, before improvedments I have written an article on how to build the model making corrections as you go to give you a more accurate and correct model. Here is a link to where the article is posted.
http://titanic-model.com/titanic_fix.html
Additionally, in 1998 I was contacted by Mincraft Model Company Pres. Al Tremble and contracted to write a full report on the copy-right infringment that the Chinese Acadmey (sp) Model Co. had done. They simply copied and reduced the scale to 1/400th. and pop out a kit. When they copied the kit, they copied several mistakes. making the case simple for the court!.
Mr. Tremble liked my report so well and the improvements suggestions to the kit, I was honored to have my name written into the new instructions for the "NEW" corrected version of the model. If you have the new version look on the "History" section for Jacob B. Groby III as well as others.