So you have used POR15 and Eastwood - how do they compare?

I thinking of using some POR15 on my sons very surface rusty Torana soon - but have recently heard about KBS Coatings and Eastwood as competitors.

I plan to brush it on, then prime, then brush on Brightside.

What do the experts on here think? POR15, KBS, Eastwood, or sand it to bare metal and etch prime...

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Eastwood

I've tried POR-15 and it works good. Love their metal preparation system. I've used Rust Bullet but it doesn't come in black. I lean toward the Eastwood online store because it has anything and everything you need for bodywork. I believe everything you can do to superbly prepare the vehicle the better the outcome will be. It's just more work on your part. That's the tradeoff.

POR-15

hey guys i have a rare 2 door sedan (rare for australia) and it had a bit of THICK surface rust on the roof when i paint striped it. although it hasnt gone to far there is alot i was going to get it paint striped but there is a 8 month wait. is there a manual type rust eater? does it eat it how does it work b4 i apply primer?