Sorvan's TARDIS Apr 27, 2006 3:43:58 GMT 1
Post by Sorvan on Apr 27, 2006 3:43:58 GMT 1
cyberleader1991 said:How long are you finding it takes the resin to cure Sorvan? I mean to the point of not being able to smell it anymore?
I don't know at what point I'm not able to smell it, but it's less than 24 hours. Full cure is supposedly 1-4 days (depending on temperature). I will point out (again) that I'm using epoxy resin which is a different beast than the polyester resin that most people are familiar with for doing fiberglassing. Most people who use epoxy seem to buy the pack of "5-minute epoxy" in two 15ml tubes at the hardware store. The epoxy I have comes in larger containers and is slower acting (and doesn't smell as much). Improperly used polyester resin remains sticky and stinky for a LONG time (ie. the one time I used it as a kid).
purpleblancmange said:I'd never considered adding sand to resin... if you had the quanity, I'd also suggest you could experiment on a bit of scrap with the sand mixed directly into the resin and scraped on with a spatula or something... you could even try mixing sand in with your paint.
I was initially thinking about mixing the sand into the resin, but decided on sprinkling the sand on top after poking around on the Internet and finding a few people doing similar things. One site in particular was a guy who made cave structures for aquariums. He would take a piece of styrofoam the size of the base of his tank, carve his caves and "rock formations" out of it, seal the foam, coat it in epoxy and then sprinkle sand on it. He obviously had to anchor these things to the bottom of the tank (so they wouldn't float to the top), but they looked pretty good.
Thinking about it afterwards, I don't think that mixing sand into the epoxy would be the best of ideas for a few different reasons. I think that with sand mixed in, you'd have to use a lot more epoxy to get the coverage right - and epoxy isn't cheap. It would be more difficult to get a uniform thickness. I think that It would also be more likely that air bubbles could be trapped underneath the sand/epoxy mixture (which would make it more fragile).
Mixing sand into the paint might also bring about similar problems. Of course this all depends on the ratio of sand to paint that you're talking about. One of the reasons I put sand on was to completely obscure the texture of the fiberglass cloth that I used. If you were painting on MDF which doesn't have a texture, you probably wouldn't want that much sand (probably 1:1). Now that I think about it, I have added sand to paint before. I mixed some into the paint that I used on my deck so that I'd have some extra traction (a ratio of 1:10 I think.. or maybe it was 1:20.. hmm, can't remember).