i love gel stain...you can brush it on with a real crappy cheap coarse paint brush over white and it will look like wood grain one coat..it does take a few days to dry...put it on thick and dont wipe it off..paint it on..kinda thick and not real smooth but from a distance it looks pretty good..i have never used on speakers, just some old doors that where white..the woodgraining tool pictured above works good too and is fun! i have used the gel on blue foam insulation board with no melting of the insulation