shellac varnish

[inecik]

Hi, I need your recomments for refinishing on radio.I am using sprey varnish but I need 4-5 can sprey varnish for a radio and suıtable place and the weather will not hot or cold.alot of difficult.
I tried shellac varnish, it is easy and very nice but it is no strong on water so can I use sprey varnish over shellac.