What type of varnish goes over solvent based spray paint?

[Graeme Whyte]

Hi
I've been helping my son make his electric guitar - he has sprayed it with an all purpose solvent based spray paint. Now we don't know what sort of lacquer or varnish we can apply over this?

Any advice would be welcome!
Thanks a lot.posting.php?mode=post&f=7&sid=66861f66fcf0a13e5c9fcff7f6e680e0# (homer)

 

[niagra]

nitro-cellulose is the traditional finish for electric guitars, however, I finished my son's bass with a waterbased clear coat from an HVLP set up.