Hey..I had a quick question maybe someone on here could help me with. I'm trying to make a black Da Cat replica kinda board. After I shaped it I put one layer of 4 oz. glass over the entire board, just one layer on the deck, using UV catalyst. Then I set about to making the large black panels over everything but the stringer. I mixed the resin, with the UV catalyst in it, and the black pigment. I didn't add any surfacing agent because the plan was that after I applied the black pigment i was going to add another layer of volan over everything, then the normal hot coat on top of that. Well, I taped off the stringer and rails and put the black pigmented resin down. I set it out in the sun and after a couple minutes the black resin like wrinkled up. It's only about 70 degrees here so it wasn't that hot outside. All I can figure is that the resin on top set off and the black pigment wouldn't allow any UV rays to get down to the bottom of the pigmented resin. So now i'm stuck with a wrinkly mess kind of sliding around black resin. Any recommendations as what to do with it? Should I just give it a day or so and try to strip it off? It's so wrinkly/bubbley that I dont think the next layer of glass would bond to it properly. It only has 1 layer of 4 oz. all the way around so I dont think it would be very hard to take all of the glass off, but I'd like to avoid doing that. Any help would be greatly appreciated. Thanks.
Hey Adam,
I think you will have to remove it... if it ever went hard it'll stay wrinkly anyway.
The secret with sun cure resin and pigment is to use a little MEKP as well. The combination accelerates cure through pigment.
But, but...maybe I'd be wary of black pigment in the sun anyway...never tried it, but stands to reason there's serious heat going on there.
Josh
Thanks man. Any ideas on how to get it off? I didn't add any surfacing agent so i can't just sand it off..
I thought about the black resin in the sun, but I figured with it only being 70 out it wouldn't get that hot in a few minutes, but..apparently i thought wrong..
adam,
i agree with josh. remove the pigmented resin and start anew. i use uv cure resin almost exclusively and when i use pigments/tints i add liquid hardner to ensure the all the resin kicks.
brasco
Hey Adam, you may have to do a thin hot coat, with surfacing agent, over it so that you can sand it all off and start again.
And use Speedy's advice and use catalyst in it to avoid problems.
UV resin is great stuff but you got to use MEKP with anything other that clear. One problem I had on my early UV resin job was forgetting to add MEKP under the area of a colored laminate. This cause the resin under the lam to not go off and needed some repair. Also a little MEKP in the resin will help the spilt resin that will never be exposed to sunlight to go off too.
D