Hi All. I have a quick (and likely stupid) question...

I've never used POR15 before, but ordered the kit from amazon which arrives today. I see that it includes some kind of metal prep / etching primer as part of the kit. I plan on using this to paint the cast section of the IRS differential tonight. My question is that the differential (bought from FFR) came painted from the factory. I assume I need to strip that paint off to get the POR products to adhere properly. Is that correct?

Also, is there a recommended brand of clear topcoat? I see POR makes one, but I did not purchase that.

Thanks,
Jason