I actually quite liked the flame effect on the first pictures.
 
 I think that you need to redo where you touched up the rear (oo-er Mrs!).  You might want to redo the white with a thin coat to strngthen the colour.
 
 Re the lettering there are few other alternatives; you can buy sheets of lettering from artshops/hobbycraft, you can make your own transfers using tranfer sheets you can buy that run through printers.
 
 If you do want to free hand don't forget that when you write we mostly tend to follow a straight line and ofetn a top line.  If you want a consistant lettering you can put a line above and below to guide you in a very soft pencil.  
 
 Also have a look at online shops like Antenocitis Workshop or the 4Dmodelshop you might find a few products there.
 
 Alternatively you can just leave it and remember the rule of 3 foot.  Which is to say even mediocre models will look cool from 3 foot away when you are standing over a full games table.  This one is my prefered option.