Fairy Power spray gets MY VOTE
every time,it does not seem to effect styrene,wood or Grp,I have found it excellent for dissolving paint off parts !!!!!! SSHHHHHHHHHHH I also use it in WORK
DISSCLAIMER
BUT I WILL NOT BE HELD RESPONSABLE IF IT DAMAGES YOUR MODEL
I have never had a problem BUT BUT BUT there is ALLWAYS a first time.I stripped an old Minitrix Hymek model train not so long ago with it and the train came up shiningly clean.
TOP TIP when using it DONT let it dry out,I ALLWAYS spray on ...leave it a few mins spray again and place it in a plastic bag for an hour,spray again into plastic bag THEN wash it off with warm water,if it needs reapplying then so be it,use a tooth brush( NOT THE WIFE'S) an old one prefferably to clean intrecate parts or an OLD 1/2 paint brush with cut down bristles
Dave