comercial tung oil like Homer formbys is all i use on bows
if applied properly and after several coats it is a very weather resistant finish and durable too
i clean the wood well with acetone first,the first 3-4 coats i rub in with a lint free cloth,in the same fashion as waxing a a car
this helps it penetrate the wood cells
after about 4 coats i then apply a more liberal coat that is just wiped on
let dry completly,then qucik rub down with xxxx steel wool,wiped down with a lint frre colth to help remove steel wool dust
then another coat of tung oil,repeat as much as you desire
for me i usually go minimum of 9 coats,prefer 12-15
looks like high end furniture when finished
some say to shiney for hunting,i dont mind it though