There was a dingy build-up on my armrests from the previous owner, so I took it upon myself to clean it with an abrasive sponge. It removed the shine on large areas..does anyone know how restore the shine? Is there some type of finish I can buy and apply it myself?

 

Is it leather ? if so get a leather cleaner conditioner and try that.

 

If it's plastic, you might try clear Fusion by Krylon.

 

Oh my bad, I forgot to mention it's vinyl..I tried to shine it with Armor-All, I'll see what I can find out about that Fusion stuff.