POR15 is good - but it isn't too good when exposed to UV... after buying the starter kit you're better off doing a coat of their tie coat primer and then spray over a satin OEM black.

Lots of work if you go down the POR15 route and you want an OEM satin type finish - if not POR15 make a top chassis coat in gloss...

Alternatively you can buy KBS coatings chassis black in a satin finish that'll go straight over the top of POR15 (or the KBS equivalent) in one go...

Tricky area to paint though as the hinged caps on the wiper arm bolt covers are likely to scratch your newly painted bits - let us know how you get on.

__________________
1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!