Foam stuff for the "rock work" look????

Well I hate not having my dig camera around when we are xperimenting around here!

Went to the fabric store bought a piece of foam padding, more or less what is in your sofa cushions.

Went to Advance auto, bought fiberglass auto/boat repairkit, and a couple extra sheets of matting.

Went and got a garbage bag & razor blade then I sat down with the foam cushion in hand....

I measured and cut out a section where my overflow would be at on the backglass.

I then began picking out chunks of foam cushion randomly sized and some deeper than others etc.... Did this for about 1 hour and I now had a piece of foam with what looked like ledges and caves, etc picked into the foam. Now I have a mold for my Back drop!

I then took the fiberglass matting and a pair of sciccors... I cut up alot of matting to small slivers, squares, etc... I left a cpl sheets uncut though for later.

I pulled out a cheapo paint brush after getting it l lmixed up and begin to paint the foam I just dug into earlier, and then placing the small cut up pieces of matting into the resin & applied more resin. I did this over and over until I had a thin layer of matting in place and I let it dry.

Doing it like this makes it easier to work with the matting and get the crinkled/textured appearance you want, whereas a single large sheet does not crinkle up as nicely imo.

I came back the next day and put a liberal coating of resin over the matting and let it dry.

Then came back the 3rd day and put more resin down and then a large piece of matte to start re-enforcing my structure, and then more resin.

Repeat last step again on 4th day.

I pulled it of the foam the other day and I must say its pretty impressive looking, and I plan on putting one more matting/resin on the backside then....

I planned on painting it in marine epoxy but adding a twist to the paint...

Ever seen textured paint in a home? Its simply paint with different sized sand in it!

I will wrap the project up with a cpl layers of darkgrey/brown mixed up with aragonite mixed into the paint to add the texture and not be as smooth looking.

Now if my brother in law would return my dig camera I could of been documenting this in pictures!
 
Another creative idea! But I'd be sure to seal that foam up extremely well -- it is probably treated with antimicrobials and would be toxic in the tank. I'm sure it'd be fine completely sealed, though.
 
There is no foam in my design, the foam is used as a mold for the fiberglass backdrop. I used foam because its pourous and when you pluck out sections of foam it looks rough no smooth edges... much like a rock.

I noticed I forgot to mention I placed a thin layer of cellophane between the foam and the fiberglass resin. This was needed to prevent the resin from sticking to the foam when cured.
 
Ah, okay. I was thinking you left the foam on as backing. I thought about fiberglass, but it seemed a bit complex without having some instructions on what to do, and a lot of stuff to get for a small project. I never thought of small kits for cars!
 
I just made some foam/eggcrate backgrounds for my new 240. Yesterday they fit fine but today they are warped. Looks like the foam expands first and later shrinks pulling the eggcrate inwards. So how do you get them to fit and stay up against the glass?
I still have to paint them but I'd like to see them fit before I go to the trouble of painting.

Thanks,
Jay
 
I reported the same effects. Lay it flat and weigh it down for a few days, and the foam will stretch out a bit.
 
you guys need tgo go to boaters world .com andcheck out thier epoxy paint section tou can get it in small tuch up sizes and buy pigments to make custom colrs
 
I checked out a couple boating works places in my area but the epoxy paint they sold was antifouling paint which definitely wouldn't be good for the reef.
I found a place that can get Sweetwater paint for me in Canada but they want $83 Canadian per gallon plus shipping (hazardous materials) if they have to send it to me.
The search continues.....

Jay
 
Jay, that's about what I paid for it if you convert to US dollars -- plus HazMat shipping. I struck out on the boat paint, but maybe you will have more luck. Be careful; all the deck paint I found had copper in it.
 
If you guys check out a certain cichlid forum that i am not sure i am able to mention you will see tons of these tanks in the tanks of the month and elsewhere
 
I ended up getting some epoxy paint used to coat the inside of potable water tanks. I got it from Tnemec, a company that was mentioned earlier in this thread. Anyway, it comes in a few colors but none that would look natural so i bought a gallon of white and a gallon of black. I plan to mix them to get grey and then use different ratios of black and white to add accents to the wall detail. I start painting this weekend.

Jay
 
Do you have to paint the foam? I just moved and am in the process of setting up my 200gal. tank again.

If I got this "Great Stuff" foam, in black, and sprayed it to cover my return PVC and my stand pipe PVC, would I have to paint over it to keep it from "breaking down"?
 
Docjay,
just some advice: i havent done this myself but ive seen some freshwater tanks that did that and there was one thing. Make sure no parts come out TOO black or else it will stand out and look very artificial. Just a hint!
 
i have some GSP attach to the reef wall already it only been around for 2mths



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give ur comments guys
 
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