Modeling Clay:
Walmart $2 for 13 oz. The package is purple and is 12 inches tall x 5 inches wide with multi color clays. Look for it in the crafts department hanging up.
MEKP:
Home Depot: $3 in the paint department
Cheap PER Resin:
Home Depot $39 gallon or by the quart also in the paint dept.
Aluminum Foil Tape:
Home Depot in the isle that has hvac and heating vents/duct work.
$3 for a small roll or $7 for a big roll(50 yards x 2 inches)
Plastic graduated mixing containers 69 cents, cheap paint rollers, cheap chinese paint brushes for $69 cents, acetone, MEK, also at HomeDepot in the paint dept.
Also at HomeDepot is bondo brand fiberglass cloth and mat in small 1yard packages. The cloth is equall to 8-9 oz weight. $6.
Preval Sprayer - $4-7 at HomeDepot in the Paint Department also.
I think they sell paint stir sticks also. aka paint paddles.