Digital BW, The Print

Hi,
when printing with the MIS Eboni-ink on Brilliant Museum Silver gloss 
paper i used to get some broncing and gloss differences. I�ve tried a 
simple hairspray to coat the paper and: bingo gloss difference is 
nearly eliminated! Is it a good idea to practise it in this way or do 
you you think it has some negative aspects a lessenening the longlivety?