epoxy spray

[pat123]

i made a stock out of styrofoam that i was going to use as a mold for aluminum. instead i was thinking of just coating it in something to make it hard. has anyone tried epoxy spray?

[MaxuS the 2nd]

What happens to the nozzle of the sprayer after you stop spraying?

[brogdenlaxmiddie]

If its what I'm thinking about, you just turn it upsides down and spray it for like 30 seconds and it's supposed to clean out the tip.

[MaxuS the 2nd]

Not if it's gone solid with epoxy, that won't happen.

How would you do it?
Epoxy is a thick, viscous liquid anyway, so it would be very difficult to make it into a fine mist.
Even if you managed to do that, then it would have to be mixed at the point where it exits the nozzle of the spray can, possibly with two nozzles pointed into the same point.

[brogdenlaxmiddie]

Hmm, I see what your saying. I asked my dad and he said that I'm thinking of "great stuff" and its not an epoxy. Sorry

[blind909]

Are you talking about this stuff?

[trollhameran]

Just get some paint and mix it with pva or something, that usually makes a hard finish

[pat123]

yeah blind that is the stuff i am talking about. I have tried coating it with other stuff but most of those just disolve it.

[trollhameran]

i would think acrylic paint with glue in would be ok to use

[psycix]

Maybe just use any air compressor spray thing to spray up epoxy, but apply it separated, dont spray both of the epoxy components out of the same nozzle at the same time. You could OR use two nozzles and spray em at the same time (best) or just re-use the first nozzle after clearing it with a few secs of spraying water.
This might ruin your sprayer, Im not sure, but its just an idea.

[nivekatoz]

You should get some fiberglass resin and fiber glass cloth and coat the foam stock with it.. Thats what they do when they make surf boards..or ultra lite air plains.

[pat123]

i think fiberglass resin melts styrofoam

[Fnord]

Epoxy won't stand up to molten aluminum. Just use some plaster.

(Well... it might, but it will probably bubble and catch on fire and stink like hell.)

[pat123]

I need something that i can spread over in a thin coating and still be strong.

[jackssmirkingrevenge]

You'll want a coating that's at least a few milimetres thick to have any measure of strength, and not epoxy on its own - glass cloth or carbon fibre matting would be ideal.

I think fiberglass resin melts styrofoam

When I need to make a lightweight middle section for an epoxy piston, I use a foam core, and it certainly doesn't melt.