I know raw linseed oil takes longer to set,but you can still build layers if your patient and build a good sheen up,and if you have facilites to buff,you can get a higher shine,the difference between raw and boiled linseed oil isn`t driers added as stated,but boiled linseed has hot air passed through it to make it dry quicker,the difference in drying time can be 3-8 days between boiled and raw linseed oil and the time of year of course,cheers,
Eric.