<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><span class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><div><span class="Apple-style-span" style="font-size: medium;">EMT needs to be "pickled" with vinegar or acid, to get the paint to hold. I love it for inland work, but near the ocean, it'll rust through in 5 years. I'm not sure how much more time paint would buy you.</span></div><div><span class="Apple-style-span" style="font-size: medium;">Anybody use other plastic materials HDPE? Supposed to not have the expansion problems of PVC.</span></div><div><br></div><div><br></div><div><span class="Apple-style-span" style="font-size: medium;"></span>R. Walters</div><div><a href="mailto:ray@solarray.com">ray@solarray.com</a></div><div>Solar Engineer</div><div><br class="khtml-block-placeholder"></div><div><br class="khtml-block-placeholder"></div></span></div><div><blockquote type="cite"><div><font class="Apple-style-span" color="#000000"><br></font>If you have to run around the roof with EMT, you can protect it from rust<br>with a coat of paint.<br><br>Regards,<br>-Hans<br><br></div></blockquote></div><br></body></html>