Keith, you obviously have access to a computer so why not go into Word and draw a text box about the size of your floor plates. In the box write in what you would like to see engraved on your floor plates. Make the text white and infill the box black. Then play around with different fonts and sizes, printing off and cutting out the text box to hold against your floor plates to give you a good representation of what they will look like. You can make your font colour gold, silver or whatever to get an idea of contrast against a blued floorplate. Worth a try.