steveo3002 said:
in some ways i think its best to make localised repairs to rust spots and leave it at that......if you cover the whole under side in goop then ok its keeping alot of salt/damp out , but it also hides rust until its really got bad
accumulator .....ive tried the eastwood RE , its alot softer than por15 but seems to be okay...to be honest i think the best you hope for is to slow rust , i cant see it being stoped by anything
Yeah, the POR-15 does dry harder. I think of the RE as sorta a primer-sealer that's not too picky about the preceding prep. So far, the big difference between it and the POR is the way the RE simply *sticks*. I and others I know have had the POR-15 not adhere; a body shop I used to patronize, who had used it before, had it come off quite badly when they did a Caprice frame of mine! They assumed their prep was faulty, but they couldn't figure out what they must have done wrong (they'd used the Marine Clean and Metal Ready) so they took it all off and redid it with something else. That sorta scared me off POR-15 even though it never failed *that* badly for me. Thank goodness they discovered the problem before putting the body back on the frame.
The steering parts on my Caprices (that *I* did myself) always held up will with the POR-15, but I was a fanatic about prepping them properly.
I wouldn't use this sort of stuff for an area that really matters, but for undercarriages, especially where you're dealing with thick pieces of roughly finished metal, it works quite well.
Here's a case where it *did* work on an area that mattered and it stayed fixed: I had some rust in the inner crimp-welds of the Jag's trunk lid, inaccessible areas. The sort of area where you simply can't get to all of it, can't even see some of the area in question. I was looking at a new trunklid and I didn't like that idea. I had Stoddard's body shop do it, and they used POR-15 and then also sprayed in the drainage holes with a "creeping" wax-based rustproofer (I forget what it was, but I'd bet it was Wurth's Body Protection). I was not optimistic, but it's over 10 years later and the rust has stayed at bay, not a trace of recurrance.
The Eastwood undercoating dries much more/cleaner than I'd expected. The undercarriage of the RX-7 is IMHO a lot nicer now than it was with the combo of factory and dealer applied undercoatings. This is not the sort of stuff that's gonna be a sticky/gooey mess; it was another nice surprise. I sprayed AutoInt's Rust Inhibitor in the subframe rails and that stuff is *not* as neat and clean, but that's sorta what you want for areas where you'd like it to spread to areas you didn't actually spray.
Hmm..never tried the Rust Bullet.