First, welcome to our happy forum!
Oil-based enamels should be able to be used, provided they are sufficiently thinned with a mineral spirits thinner. You're going to have to experiment a lot to see what works best. If you are going to shoot an oil enamel, I would recommend putting on a flat enamel primer.
BTW, if you have internet access, shouldn't you have the ability to puchase modeling supplies from almost anywhere?
Gip Winecoff