Stop by a resturant supply. They have sleves of 100 of the little 3/4oz and larger plastic cups for $2.00 or less. geat for mixing epoxy. No chance of a bit of oir sticking in a corner and contaminating a batch. They also make geat small parts cup. Tearing down and engine and a couple of these cups will keep the screws and gaskets rounded up. When through, pitch them. At less than 2 cents each, you can't aford to clean them.
As mentioned before the local hardware store is a great place for small nuts and bolts. The problem is they usualy stop at #6 and a few #4 ones. There is a supply on the web that has the real small stuff, but you need to buy in boxes of 100 so it may not be very cost effective. They do have small threaded rods and tubing.
http://www.smallparts.com/
Striping, Kragan and other auto parts stores stock 1/8" and 1/4" wide vinal striping tape. Only comes in red, black and silver, but it is way cheaper thatn the hobby shops. I understand that some automotive paint shops have other colors.
Don