<div dir="ltr">This is similar experience but not with hardboard. We had been specifying Rosco Tough Prime on Plyron and were getting reports of easy damage with chairs, risers and tape. At first we assumed lack of cleaning and prep by contractors. I did some tests and found the same thing, no matter how I prepared the Plyron. Even scuffing it lightly didn't give it enough tooth to hold the paint well enough. I also tested RoscoCoat and it performed a little better than the Tough Prime but with a bit more sheen but still was damaged easily. We were turned on to PPG Break Through Wrought Iron Black. Similar cost and VOC content to Tough Prime. It has a little more sheen but personally I don't like that Tough Prime is so flat that every footprint shows on a stage. The PPG product seems to be much more durable in our tests, adhering well to the Plyron. We changed our spec in the past year or so and to date we've had fewer call backs. May be worth a test.<div><br><div>HTH<br><div><br></div><div>Paul Sanow ASTC</div><div><a href="mailto:paul@bcaworld.com">paul@bcaworld.com</a></div><div>Bill Conner Associates LLC</div></div></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Jul 16, 2015 at 2:31 PM, Matthew J. Evans via Stagecraft <span dir="ltr"><<a href="mailto:stagecraft@theatrical.net" target="_blank">stagecraft@theatrical.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">
<p class="MsoNormal">Over the <span>summer,</span> we
installed a new stage floor surface on our stage. We used double-sided
tempered hardboard - aka as Masonite. Yes – I realize Masonite is like a <span>brand name</span> like Kleenex is to tissue. The
hardboard <span>was laid</span> over the original
stage floor made out of maple tongue and groove boards. Expansion gaps <span>were left</span> in between each piece of Masonite and
fastened to the <span>ground</span> with Senco 8x1 1/4
cement board screws. Before the floor was installed. <span>We</span> painted all surfaces and edges
with Rosco Tough Prime. I’ve used Tough Prime since it came out and
never had a problem with it.<span> <br></span></p><p class="MsoNormal"><span><br></span></p>
<p class="MsoNormal">After the Masonite <span>was
fastened</span> <span>to the ground</span> we noticed
that the paint was coming off by rubbing our shoe against it. We were
turning our foot on the edge of the sole and swiping the floor. I'm not
talking just <span>a regular</span> <span>scuff</span> from the rubber <span>sole;</span> I'm talking paint completely pulling off down to raw
lumber. I contacted Jenny Knott at Rosco and explained our situation. She
informed us that she <span>had</span> seen instances
of this. She went on to explain how the processing of tempered hardboard
has changed over the years. Apparently, the processing now involves
linseed oil. And as we all know, oil and water-based products do not <span>mix</span>. She advised us to wash the raw Masonite and
apply more coats of paint. She also advised us to let the floor cure for 48
hours. <br></p><p class="MsoNormal"><br></p>
<p class="MsoNormal">The other layer of this onion involves our observation of
lighter colored Masonite. <span>I'm used</span> to the
chocolate brown <span>Masonite. Instead,</span> this Masonite
was blond in color. I contacted the lumber <span>yard,</span>
and they said color <span>didn't make a difference</span>.
The Masonite had a smooth finish on both sides, so I know <span>it’s tempered</span>. We went to another lumber
yard and picked up another batch of Masonite. This time it was a little bit
darker – almost khaki colored - but not the dark chocolate color I'm used
to. </p>
<p class="MsoNormal">We paid extra attention to washing the floor and again
painted all surfaces and edges.<span> </span>After
laying the floor a second time, it was still doing the same thing with our
shoes.<span> </span>We tried several tests using
different coats of paint and ultimately discovered it would take four coats of
paint to resist scuffing.</p><p class="MsoNormal"><br></p>
<p class="MsoNormal">It’s been about a week since we finished the last coat and yesterday
we had to lay <span>tape</span> down on the floor to
mask out an area to paint a safety line. Today, when we went to pull up the <span>tape,<span> </span>some</span>
of the top <span>layers</span> of the <span>floor</span> came up with it. The tape was down
for 24 hours. The floor had over 48 hours to dry. </p>
<p class="MsoNormal">I’m certain we may have a manufacturing issue with the
lumber.<span> </span>The paint is adhering and doing
its job. Rosco has checked the batch number and everything checks out.<span> <br></span></p><p class="MsoNormal"><span><br></span></p>
<p class="MsoNormal">Has anybody experienced this? </p>
</div>
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