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| scotty b |
 Jan 5 2011, 03:17 PM
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rust free you say ?  Group: Members Posts: 16,375 Joined: 7-January 05 From: richmond, Va. Member No.: 3,419 Region Association: None  |
I have to make a custom bumper for a car. I am familiar with the mold process but what I do not know is what type of expandable foam I should buy. I am planning to make a wooden box ( form) to pour the foam in, then attatch it to the car and start cutting and sanding to get the desired shape. What I need is something that will expand and still be closed cell enough to handle cutting, sanding and shaping, then can handle bondo being applied to get that oh so smooth ready to be painted, finished buck. (IMG:style_emoticons/default/wacko.gif)
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| Borderline |
Jan 6 2011, 10:22 AM
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Senior Member Group: Members Posts: 720 Joined: 8-February 05 From: San Juan Bautista, CA Member No.: 3,577 Region Association: Northern California |
The polyester resin will eat up a lot of stuff and most foams. Surfboard blanks are made of polyurethane foam than can stand up to the polyester resin. I made a mold of my targa top and the polyester resin ate thru all the wax mold release compound and wrinkled up the paint. Try using an epoxy resin for the first layer of your mold. The epoxy will not melt thru the various materials. After it cures, you can add a bunch of stiffening layers to the mold using the cheaper polyester resin. FWIW
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Posts in this topic
scotty b fibreglass experts Jan 5 2011, 03:17 PM
underthetire Tap plastics used to sell a resin foam, it was pre... Jan 5 2011, 03:38 PM Rod Use polyurethane two-part foam, The foam from diy... Jan 5 2011, 03:53 PM jd74914 :agree:
I don't have much experience, but if ... Jan 5 2011, 04:16 PM iamchappy Have you considered using Styrofoam and shaping it... Jan 5 2011, 04:30 PM URY914 Try looking at some of the projects on here.....
... Jan 5 2011, 05:09 PM
andys
Try looking at some of the projects on here.....
... Jan 7 2011, 10:48 AM RJMII This place seems to have a lot of information. I d... Jan 5 2011, 05:12 PM kg6dxn Order some surf board blanks :headbanger:
There... Jan 5 2011, 05:14 PM URY914 I see the pink insulation boards that you can get ... Jan 5 2011, 05:55 PM stepuptotheMike One of the shows I saw on TV used sheets of floris... Jan 5 2011, 06:16 PM URY914 The spray on foam seems to be used also...
Befor... Jan 5 2011, 06:18 PM r_towle Scotty,
Use the simple spray foam and cover it en... Jan 5 2011, 07:16 PM mepstein comes in 914 colors Jan 5 2011, 08:23 PM plays with cars Use the pink stuff from Home Depot. You can rough... Jan 5 2011, 08:44 PM Dr Evil I have used the spray foam. Cheap and easy, oh ya ... Jan 5 2011, 09:07 PM scotty b The sheets and particularly spray foam just isn;t ... Jan 5 2011, 09:08 PM stepuptotheMike B)--><div class='quotetop'>QUOTE... Jan 5 2011, 10:26 PM URY914 B)--><div class='quotetop'>QUOTE... Jan 6 2011, 06:01 AM buhs914
B)--><div class='quotetop'>QUOT... Jan 6 2011, 09:49 AM Dr Evil Shhhh
Yer phone is broke <_< Jan 5 2011, 09:29 PM URY914 Yes the green foam used by the flower folks will n... Jan 5 2011, 09:41 PM Phoenix-MN This place has all the "glassing" suppli... Jan 5 2011, 10:02 PM Dr Evil Plastic wrap can work as well, no? Jan 5 2011, 10:35 PM stepuptotheMike
Plastic wrap can work as well, no?
that's fo... Jan 5 2011, 10:39 PM scotty b
Plastic wrap can work as well, no?
that's f... Jan 5 2011, 10:43 PM scotty b
Plastic wrap can work as well, no?
No, the final... Jan 5 2011, 10:42 PM r_towle Florist foam, the green stuff, holds up to "s... Jan 6 2011, 07:59 PM Bartlett 914
Still, the cheapest way to go is pink foam for ... Jan 7 2011, 09:39 AM scotty b O.K. I'm going to try the pink foam since it i... Jan 6 2011, 08:23 PM RJMII
Woo hoo!! Pics ROCK!!! :hea... Jan 7 2011, 09:20 AM 76-914 Stay away from from the polyester resins; unless y... Jan 7 2011, 10:20 AM geniusanthony The cafe racer board I frequent also swears by flo... Jan 8 2011, 12:30 AM GS Guy I believe Blueovalz did his car using the florist ... Jan 8 2011, 09:54 AM |
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