Not familiar with your specific mirror. But I did have the two head Velvac mirrors replaced with Monaco auction purchased three head mirrors. (I wanted the third top mirror to have angled upwards to see the top sides of the coach, while backing into tree line sights. Has worked very well for that purpose.) These are plastic shells, with a chrome looking film over them. Not real chrome.
If yours are that way, here is a google search on plastic chrome repair:
https://www.google.com/#q=plastic+chrome+plating+repair
Suspect if you removed them, and took them to a body shop, they'd probably be able to respray them for you(?). Or possibly do it yourself?
Now the arms are a different story, and are real chrome. But IMO, not very good real chrome. My arms were bubbled in a few locations when I bought the rig. Have not done this yet, but my To Do includes removing the arms, and taking them to a shop I know that does custom chroming for motorcycles. Probably cost me a few hundred to have them walnut blasted and re-chromed - but would be a much higher quality application then came from Velvac (IMHO).
Best of luck to you,
Smitty