Does it turn blue?
This should be interesting! I think Kills will be a good primer, interesting read HERE on latex paint vs oil if you have time…
Personally, I don’t think this will be big enough for your next monster build 
It won’t be big enough for one of the last ones I did, but it will have a 6" opening in it. Still less than 5% of the total surface area. Ought to hold most lights easily.
But your lights don’t fall into the “most lights” category 
Very cool OL!! How do these things work? I'll have to look it up.
Well, it's a disaster on the IS. I finally got one layer on and let it dry. Then I put on a second layer and when it dried, I got several large buckles in the outside. The best way to describe them would be lines of raised area similar to an earthquake, where one edge heaves up and the other depresses. There were also cracks and while it would be grand to figure out why, I won't bother with that. I think it's simply loss of air in the ball, or expansion and contraction of the ball, due to the large variances in temperature in the garage. No matter what, it is not acceptable and after three days working with it, I am not willing to @#%@ with it any more. Simple as that.
Some things, well, many things, I cannot do or deal with. This is one of them.
I failed with the paper mache method too, it never got stiff enough and when finally coating the inside, the paper began to crumble up 
.
I used styrofoam balls since then. These also have their challenges, but they could be handled a lot easier.
I understand you were trying to build the Integrating Sphere, but what is the goal of this step? Simply building a rigid spherical structure? If so, have you considered chalk? It would end up kind of fragile and on the heavy side, but MAYBE it could do.
Unfortunately, I cannot find a foam ball in 36", in the USA. The people carrying them, do not carry them any more, because there were not enough sales for them. Anything smaller will not work for the big lights, due to the “total surface area vs the combined port area 5% rule”
What’s the quote regarding the proverbial Murphy’s Law ?
:arrow: ” If something can go wrong , it will go wrong ! ”
( Does anybody really know who Murphy was ? )
It’s not a fail!!!
A fail is not accomplishing something because you didn’t even make an attempt. This is an experiment which didn’t produce your desired results.
Hey OL would this globe led lamp work?
This one is 19”
http://www.dwr.com/product/globe-portable-led-lamp.do?sortby=ourPicks
Another idea is to make the ball using a round balloon and paper mache kind of like this, maybe instead of newspaper you could use white printer paper…
Or for more professional results contact a place where they make Mexican Piñatas and ask them to build you one, would that work?
Just my $0.02
The styrofoam balls here in Europe go up to 50cm outer diameter (~20inch), that is not big enough either.
Does it have to be foam?
This might work. Order in white ask them to drill the holes in price quote.
Ooohh, I Like that! You must be a motivational speaker. I put it in the title line.
That is a good idea. I will be contacting them and see what they say. Thanks!
I’m honored!!
I have an idea. Will post a pic later.