Edit train (1992 stock)

Hi everyone,
I don;t have any edit Openbve train knowledge! I just know how to edit the Photo , So I just can edit something that is made of image. But i can't find any image about the handrail of 1992 stock. So, How can I change the colour of the handrail???!
Picture: https://2img.net/r/ihimg/photo/my-images/51/1992stockwcproblem.jpg/

It is complicated without knowing how objects are made for bvetrainsim.
You would need to find the object file with the handrail in it to know the name of the image file used. The image file (probably in .png format, though it might be .bmp) can be edited with most bitmap photo editing programs and used as replacement.

Alternatively you could just open the object csv file and change the colour of the object.

You still need to know what you are doing. Object textures and object color (RGB) are not the same.
Anyone who wants to mess with it might do best to look in the knowledge base here on this site and see what tutorials might help to gain understanding.

But I seems to be can't find any image file or csv file about the hand rail>_____<