Just did my safety markers and wow it looks nice.

I used Red and White Crayons.
A small hair dryer
paper towel and a stiff toothbrush plus toothpicks
Alcohol and some Hoppes 9 oil.

Heated the Crayon and the area at the same time until the crayon was getting ready to drip. Then rubbed it into the area and pressed it in further by hand. I then heated the area again with the hair dryer until it flowed a bit and then let it cool.

Scraped off the excess with my finger nail and then wiped the area with alcohol. Next I used the toothpick to clean out excess that had gone near that safety lever and on other areas and got the final bits out with the toothbrush. Cleaned down the area with alcohol and everything looked about 95% good. I then used a dab of the hoppes oil on the paper towl and I was surprise that a lot of excess Red and white was coming off the flat surfaces of the polymer.

After that it looked like a factory job.

Thanks for the advice guys and gals.