I've noticed that the Philips SDW-T and SDW-TG, tends to rectify during starting, even when new.
Why this is happening?

I bought it at Machsanei Teura lighting store.

That sounds good. Where did you get your track light?

I've done a lot of hot restrikes with my Philips HID-PrimaVision PV C 70 /S CDM electronic HID ballast in my tracklight, and its ignitor still working perfect.

I love these things/  Got a better quality one a number of years back from off of EBAY.  It came with a crummy 6500K tube, so I replaced it with 4100K and I like it.

Personally I hate powder coat😬, especially when it starts lifting after a few years of the elements!
For all my lanterns in use outside, I have always used auto paint
My GEC on the front of the house was originally moulded in a creamy/beige fibreglass, which after years of use outside starts to expose the glass fibre in it!
I re-sprayed the whole thing using a ‘Rover’, (British car company), beige colour that was similar to the original GEC colour! 😀
It’s still looking like new today 😎

You can try. Remove the front cover so the tube is not enclosed, it will run much cooler. And add a reflector inside to cover all plastic surfaaces exposed to he tube. This can be with Aluminum foil glued in, i wonder how reliable/long lasting would be just spraying its insides with bright metallic color or similar spray. (Disassemble and mask it properly)

Asking because I need to redo the paint job on my OV-25. Going to go hammered silver color cause that is the original paint that Westinghouse used. Is it a good idea to do that?

If you'd like to actually see the unreleased Tru-Tone products, see Dan Neuman's video.

Any improvements I could make to it?