Is it possible to ship (FEDX or USPS) powdered Chem in advance? Customs can be a bit crazy when they find white powder chem in your baggage, you may be fine but you should check with customs first. If they say it is fine get them to write a official letter for you or make up a list of the the things you are taking, then take this list with your chem to customs a few days so before you leave, get them to inspect everything and put a official stamp or sticker on it. Also get your friend at the arts school to write you a letter of invitation on their official letterhead (have him scan it and print it out in a Quality printer), also if your friend is connected he may also be able to get you some sort of a Press Pass.
I would take R/C paper rather than fiber as this will be less trouble to develop, you can just use water for a stop with R/C Paper.
I once got stopped at a airport while on assignment traveling from here, Australia to New Zealand, I had a Custom Built case (The Maximum carry on size down to Millimeters) with cameras and lenses in it. I was not stopped by customs but by a Airline Officer !!! she had me weigh the case !!! it was 1 or 2 KG over weight. She started giving me a hard time, wanted to charge me excess baggage and have the case checked in...I at that point puled out my folder with letters, customs documents and a press pass....She took one look and her face went a bit white.....I was not a ordinary passenger any more.....I was taken to to the front of the cue, put on the plane before 1st class and the crew found somewhere nice for my camera case so that it would not get damaged !!!!
I have found that if you are traveling with anything slightly off beat to ANY WHERE !! by plane Post SEPT 11 you cannot have too much paperwork !!! The more customs stamps, stickers and letter head the better....
Also you might want to take copy's of the EPA Documents showing it not hazardous stuff you are carrying they are available to down load from Kodak ect
Best of luck
Johnkpap