Nice restoration on this!
If you need a chrome spraypaint, try Rustoleum "Plastic" brand, I think the color is called "Gloss Silver" or "metallic silver" - I got it at Home Depot in the states - it is an acrylic glossy silver that *should* match Primes smokestacks.
Also Krylon has an enamel spraypaint I've used many, many times on vintage TFs, Takara, and Bandai stuff to fix vac-plated toy parts. It works great but it *will* react with some plastics, especially the cheaper model-kit type, so try it out on a scrap piece first. Worked great on old Takara Diaclone stuff but reacted badly with some vintage Bandai parts.
You did a great job on this guy, he looks really clean and nice!