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I am a total newbie, but would be happy to share my experience for what it is worth.

Plastic has memory and will (depending on the type of plastic) try to go back to it's original formed shape over time. So, heat and cool usually work, up to a point. Ok, so now you have the sum total of my industrial design and materials technology college degree (what a waste )...

I have been building a '95 DP helmet for my son and I used the metal bar technique, in addition to the heat and cool method. Actually I used some thin copper tubing which bends a bit, so I could shape it to get the right flare. I also ran the copper to the mandibles so that I could move those, as they kept getting slightly out of alignment with the rest of the dome.

I will try to post a pic this weekend, but this seemed to work pretty well. Other people on this forum are much more knowledgeable than I am about these things, but thought I would share what I did.

<blockquote data-quote="Bubba Fett" data-source="post: 85514" data-attributes="member: 1397">I am a total newbie, but would be happy to share my experience for what it is worth.&nbsp;Plastic has memory and will (depending on the type of plastic) try to go back to it&#039;s original formed shape over time. So, heat and cool usually work, up to a point. Ok, so now you have the sum total of my industrial design and materials technology college degree (what a waste <img src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f641.png" class="smilie smilie--emoji" loading="lazy" width="64" height="64" alt=":(" title="Frown&nbsp; &nbsp; :("&nbsp; data-smilie="3"data-shortname=":(" /> )... &nbsp;I have been building a &#039;95 DP helmet for my son and I used the metal bar technique, in addition to the heat and cool method. Actually I used some thin copper tubing which bends a bit, so I could shape it to get the right flare. I also ran the copper to the mandibles so that I could move those, as they kept getting slightly out of alignment with the rest of the dome. &nbsp;I will try to post a pic this weekend, but this seemed to work pretty well. Other people on this forum are much more knowledgeable than I am about these things, but thought I would share what I did.</blockquote>

[QUOTE="Bubba Fett, post: 85514, member: 1397"] I am a total newbie, but would be happy to share my experience for what it is worth. Plastic has memory and will (depending on the type of plastic) try to go back to it's original formed shape over time. So, heat and cool usually work, up to a point. Ok, so now you have the sum total of my industrial design and materials technology college degree (what a waste :( )... I have been building a '95 DP helmet for my son and I used the metal bar technique, in addition to the heat and cool method. Actually I used some thin copper tubing which bends a bit, so I could shape it to get the right flare. I also ran the copper to the mandibles so that I could move those, as they kept getting slightly out of alignment with the rest of the dome. I will try to post a pic this weekend, but this seemed to work pretty well. Other people on this forum are much more knowledgeable than I am about these things, but thought I would share what I did. [/QUOTE]

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