Thank you once again Gary.

I will try to put all that to good use. I had actually gone to kremer before to see if Prussion Blue could be found under their 'pigments for Fresco' catalogue. But i didn't see it there. But they also said their list is not definitive, so i thought i would ask here to see if anyone knew off the bat. Though i suppose the best way to find out is to try it myself. And that i will do. I just have no long term experience with such things, and i know with fresco often things will appear to work at first, only to find out later on down the road that it actually served to some ill-effect.
I once tried to wash my sand by stuffing as much as i could into a panty hose (you can actually fit quite a bit in just one legging), and then ran it under the tap of the bathtub. Only once the sand got wet it started to leak out of the mesh of the hose as well, so i scrapped that idea. But i will go to a garden store and see what they have to offer or suggest. Do you think its really important for the sand to be washed? Would the dirt that is mixed in along with the sand cause any problems other than dis-coloration of the lime? I have used un-washed sand before in practice panels and it seems to have worked quite well. But once again my experience makes it impossible to say anything definitively.
A few days ago I had taken a little trip out of town and bought myself 4 20k bags of high calcium hydrated lime and a big plastic garbage can with wheels to store and age it all in once I slake it. So thats pretty exciting. I also was able to find out the data information on the lime i have been using all this time and was pleased to see that it had 94.8% calcium and 1.01% magnesium on average. I was pretty happy about that. not perfect, but i mean while im learning and praticing on my own it seems to work great.
i wrote a childrens song about fresco that everyone seems to think is just absolutely helarious. It teaches you a little bit about fresco, a little bit of italian, and a bit about masters who have used fresco in the past. Plus it can be sung in 'a round'(i think thats what that is called when one set of people sing the song normally and then another group comes in singing from the first verse, only they come in when the first group is halfway through the song, or so many beats ahead.. however.)Its kinda short, but Its fun to sing.. kinda polka-ish. hehe. Anyways.. painting houses is tottally un-mentally stimulating for me so i get a lot of spare time in my head to come up with this stuff durring the day.
This might be a silly question. The Sistine Chapel- All the fresco's have cracks, big and small running through them. Were these placed there intentionally by the artist, or are they just a byproduct of time? Ive always thought they are just markings of the passing of time and the shifting of the earth, but just wondering. Will all fresco's eventually begin to crack?
Thats enought of that. hope everything is going great for you, and anyone else who may be reading. Keep painting.

R