I'm trying to engrave this rod that is stainless steel coated with teflon. The sample i have, the lettering is a white silvery color easy to read from a distance. When I engrave it, it comes out a brownish color and unreadable from a distance. is it even possible to get the color change with just lasering?

i have i m series pinnacle laser (m25 i believe)

ps. i'm self taught and new to laser engraving

any help is greatly appreciated
thanks!