all my fins are made of wood as well …
you want a piece of laminex or some other really shiny surface to work on …and some mold release agent as well ,makes the job way easier,
i use two different techniques,one for centres and the other for sides…they all get done together tho …i usally run between 6 and 9 sets of thrusters …once your doing more than 27 fins at once time becomes an issue …
first stage is simple cut and foil timber (i use 9mm ply),if you leave your leading edge a little fuller itll help for glassing later…
then i line up all my centre fins on the shiny laminex surface and cut 2 layers of 6oz which i lay on the laminex next to the centre fins …i mix some res and glass the the two layers on the laminex ,then pick up the wet cloth and lay it on the centre fins that way you can keep the glass off the table coz the glass only just makes it to the leading edge, spans a gap of about 1.5 cm then onto the next fin ,…
then the area where i picked up the wet cloth from i wet a little more ,covering more area ,then place all my side fins flat side down…i usually stick em down in setts so they look like boomerrangs lined up the fins are base to base…
while the resin is drying i cut my glass rope and two large patches of 6oz,when its tacky enough so the fins dont move ,do the next brew ,wet out rope and lay it along leading edge then the tacky spots between the fins come in real handy coz when i put the glass on it sticks down real firm…wet everything out and work the bubbles out with my finger along leading edge like when your setting fins on a board…once that sets ,hot coat both the row of centres and sides,
when its dry a few hours later get a scraper and lift all the side fins in one sheet.off the laminex, then run a sander over the flat side and glass 2 more layers of 6 oz on ,just like you were laminating a board with a sqeegee,…
now your centre fins have a layer of glass one one side ,you can lift em up turn over and put glass rope on leading edges and then the last 2 layers of 6oz and work out bubbles like side fins …then hot coat…
when all the glassing is done you have a whole sheet of perfectly glassed fins …
now you just cut em out with a jigsaw and clean up the foils ,ready for the board…
regards
BERT
eventually when i get a camera i will post a series of shots that shows the sequence i just explained…