Search found 178 matches

by modelnutz
Sat Dec 03, 2016 11:24 am
Forum: Lighting & Electronics
Topic: Light defusing?
Replies: 23
Views: 36067

1.5 % to 2.5 % Talc added to clear urethane when casting makes an excellent light diffusing material
by modelnutz
Tue Nov 03, 2015 7:27 pm
Forum: Construction
Topic: Brand new to Resin Casting, need advice
Replies: 10
Views: 17523

I would recommend looking at Smooth-On. Their SC-300 is a stellar choice for the first timer. They have small kits as well...$30-$40 plus shipping will get a decent amount of resin that will make quite a few small to med. sized pieces. I would also recommend their Mold Max 30 or 40 as a silicone of ...
by modelnutz
Thu Aug 06, 2015 4:33 pm
Forum: Finishing
Topic: Need help painting polypropylene
Replies: 14
Views: 19694

When I was working with Fisher-Price , I had to do a lot of re-painting of production toys that were made from Polypropylene. The only way to get paint to reliably adhere was to sandblast the parts first. This created a rough surface for the paint to "grab" on to. Once this step was done ,...
by modelnutz
Sun Jun 21, 2015 5:45 pm
Forum: Construction
Topic: Will a centrifuge get rid of bubbles?
Replies: 10
Views: 27799

The rubber typically used in spin casting is a sheet material. Much firmer than the silicone most guys use. I'm sure that you can find "RTV" rubber in a liquid form ... that's "Room Temperature Vulcanizing" silicone...AKA Mold-Max, GI-1000,etc. I would say standard silicone would...
by modelnutz
Mon Jun 15, 2015 2:09 pm
Forum: Construction
Topic: Will a centrifuge get rid of bubbles?
Replies: 10
Views: 27799

Another thing to consider..the molds are heat vulcanized.
Lots of heat and pressure.
by modelnutz
Fri Jun 12, 2015 9:39 am
Forum: Construction
Topic: Will a centrifuge get rid of bubbles?
Replies: 10
Views: 27799

Look in to spin casting. Works for metal...I'm sure it would work for urethanes. Of course..if people were in the habit of testing the relief valves on their pressure pots..there wouldn't be so many "horror stories" of exploding pressure pots. To test safely.... fill the pot nearly full wi...
by modelnutz
Fri May 15, 2015 8:22 pm
Forum: Construction
Topic: vac forming?
Replies: 15
Views: 21730

Unless you use a 2 piece female mold
by modelnutz
Thu Apr 09, 2015 3:54 pm
Forum: Scratchbuilding
Topic: Quick and Dirty Resin Casting?
Replies: 9
Views: 22140

***
by modelnutz
Tue Mar 17, 2015 7:14 am
Forum: Scratchbuilding
Topic: Mold material
Replies: 8
Views: 17510

:P :D :D :D
by modelnutz
Fri Oct 24, 2014 2:35 pm
Forum: Construction
Topic: Bussard dome diffusing
Replies: 6
Views: 14932

Polyfill
the stuff you put in pillows

works great
by modelnutz
Sat Apr 12, 2014 6:51 am
Forum: Construction
Topic: Bonding Styrene to Wood
Replies: 7
Views: 13487

3M's methyl acrylate is the stuff

Others may chime in with different glues ( that may very well work ) but that's my go-to glue for difficult material bonding
by modelnutz
Fri Sep 06, 2013 7:10 am
Forum: Construction
Topic: Rod or tubing?
Replies: 5
Views: 12486

IMHO....a rod will always be stronger....but...a tube will always be more rigid.

I believe what you are looking for is rigidity..if so..go with the brass tube.
by modelnutz
Tue Jul 30, 2013 10:30 am
Forum: Scratchbuilding
Topic: Mass Effect Normandy
Replies: 20
Views: 32260

you just did :D
by modelnutz
Fri Jul 05, 2013 3:24 pm
Forum: Scratchbuilding
Topic: Mass Effect Normandy
Replies: 20
Views: 32260

FYI... the SR-1 kit is still available
The Mako is being cast and will be available as soon as I can get some decals run. ( Al Wong is currently working up the artwork for decals )

The 1:350 SR-2 is still an on-going project I'm hoping to have available before end of the year ( stay tuned for more )
by modelnutz
Wed May 29, 2013 11:19 am
Forum: Construction
Topic: Two part mold
Replies: 12
Views: 18919

Ooops...double post :oops:
by modelnutz
Wed May 29, 2013 11:18 am
Forum: Construction
Topic: Two part mold
Replies: 12
Views: 18919

A solution dicovered through trial and error....lots of error... :oops: But, I know from experience....it works ! Step 1... apply a light coating of vaseline cut with Mineral Spirits to both the mold cavity as well as the master. Step 2 .... insert the master back into the mold cavity. ( wipe away e...
by modelnutz
Fri May 24, 2013 3:23 pm
Forum: Construction
Topic: Bonding styrene to … wood? Or is there a better choice?
Replies: 9
Views: 16311

Have you considered using urethane sign board ?
You might be able to score some decent sized pieces from your local sign maker/shop.

It's really east to work and finish.
by modelnutz
Wed May 22, 2013 2:24 pm
Forum: Construction
Topic: How to create LARGE fibreglass molds/parts??
Replies: 6
Views: 11800

FYI...urethane works real well with fiberglass....no polyester fumes to deal with.
by modelnutz
Thu Mar 07, 2013 1:49 pm
Forum: Lighting & Electronics
Topic: LED diffusion question
Replies: 5
Views: 9205

Polyfill ( pillow stuffing material ) will spread the light quite nicely
by modelnutz
Fri Feb 22, 2013 4:59 pm
Forum: Scratchbuilding
Topic: Question about creating surface panels on a frame.
Replies: 20
Views: 25539

How big will it be ?
Length/Width ???
by modelnutz
Wed Feb 20, 2013 5:26 pm
Forum: Scratchbuilding
Topic: Question about creating surface panels on a frame.
Replies: 20
Views: 25539

That design looks like a great candidate for vac-forming !
by modelnutz
Wed Aug 01, 2012 11:41 am
Forum: Scratchbuilding
Topic: Looking for screen grabs
Replies: 0
Views: 9887

Looking for screen grabs

If anyone can help with a few screen grabs of the Normandy SR-2 Hanger area I would be most appreciative of your sharing same with me :D

I'm looking for a complete walk-around...sides, ceiling and floor

Thanks in advance !
by modelnutz
Mon Jun 18, 2012 5:02 pm
Forum: Scratchbuilding
Topic: How to make Female molds for vacuforming?
Replies: 7
Views: 16652

Best vac material I've found is an Aluminum Filled Epoxy from Huntsman Chemicals. Not cheap...but...rock hard and Uber-durable with a stellar surface I pour the Epoxy just as you might for an open back mold...let the Epoxy cure...then ( and this is where experience pays off ) I drill very small hole...
by modelnutz
Tue Apr 10, 2012 3:46 pm
Forum: Construction
Topic: Low toxicity/quick cure room temp resin recommendations?
Replies: 4
Views: 6746

Smooth-on SC-300 ( fast ) or 305 (slower )
Easy 1 to 1 ratio
Not brittle like polyester resins

They sell a sample kit... believe it's 2 quarts of resin total.
Costs around $30.00

Good stuff !
by modelnutz
Mon Jan 09, 2012 2:19 pm
Forum: Construction
Topic: Does Future inhibit cure of platinum rubber?
Replies: 13
Views: 13089

irishtrek wrote:Or why not add the future to what's going into the mold???
If there is any water in the Future...you will get foamed resin.
by modelnutz
Thu Dec 29, 2011 1:48 pm
Forum: Construction
Topic: Dragon skin vs Oomoo 30
Replies: 5
Views: 9032

That would be a safer approach. The dragon skin is pretty floppy...it was designed for animatronics skin...but, if you make the blocks of silicone kinda large...there should be few issues. You will have to be careful when clamping the mold halves together....the silicone will be quite easy to distor...
by modelnutz
Thu Dec 29, 2011 1:40 pm
Forum: Construction
Topic: Dragon skin vs Oomoo 30
Replies: 5
Views: 9032

You will ( most likely ) have cure issues even with a barrier coat of vaseline....platinum cure silicones are very touchy that way.
by modelnutz
Thu Dec 29, 2011 1:27 pm
Forum: Construction
Topic: Dragon skin vs Oomoo 30
Replies: 5
Views: 9032

But, and this is a biggie...are they both tin cure silicones ? I believe that Dragon Skin is a platinum cure silicone. As such, it will not cure against a tin cure silicone ( I believe that OooMoo is a tin cure ) If I'm wrong, and they're both tin or platinum....disregard this message and ford on !
by modelnutz
Wed Dec 21, 2011 5:25 pm
Forum: Construction
Topic: Help release mold parts
Replies: 5
Views: 6312

Mineral spirits is the solvent of choice when thinning vaselene
by modelnutz
Sat Dec 03, 2011 1:33 pm
Forum: Construction
Topic: Help! looking to try my hand at making fiberglass shells
Replies: 7
Views: 9749

Wow...thanks Steve !

Say, what's the next project ???????

:D