Darthness wrote:another thing...
can chicken wire be used to make an accurate mold?could i use it to form the shape of my trunk and then take it out and start glassing from there? HOw is it cut also? would i need a dremel to cut or could i just use some hand tool
The "easy way out" of making a mold of your trunk well, is to line it with painter's drop cloth, and use standard Polyester resin (just make sure it doesn't say "epoxy resin") for doing your 'glassing.
Polyester resin doesn't stick to plastics (or really anything that's shiny and non-porous).
So, you can lay down some painters dropcloth, press it and double-sided tape it into position just to hold it flat on your surfaces as desired...
Then, rest your wooden frame structure in place (the sides/front/back of the "enclosure" that the top baffle will be screwed to).
Then, do your fiberglassing - glass the trunk well (you'll be sticking your pieces down to the plastic, of course), and make sure you fiberglass right up to and overlapping the MDF wooden structure - the resin will bond strongly with it.
Once the piece cures, it'll lift right out of the trunk (unless you went nuts with the double-sided tape

).
Flip it over, and rip the plastic off your cured piece - it'll come off like the backing on a sticker (but if you mixed your resin properly, won't be sticky like a sticker

).
Pretty easy, really.
IF you want to mold a trunk LID - I'd suggest removing it - and plastic might work if you are really good with the doublesided tape - but I'd probably just tape over any holes and seams, and then use a mold release wax (car waxes actually work just as well, IMO - and are softer and easier to work with

).
Fiberglassing upside down is asking for trouble.
[quote="Darthness"]another thing...
can chicken wire be used to make an accurate mold?could i use it to form the shape of my trunk and then take it out and start glassing from there? HOw is it cut also? would i need a dremel to cut or could i just use some hand tool[/quote]
The "easy way out" of making a mold of your trunk well, is to line it with painter's drop cloth, and use standard Polyester resin (just make sure it doesn't say "epoxy resin") for doing your 'glassing. ;)
Polyester resin doesn't stick to plastics (or really anything that's shiny and non-porous).
So, you can lay down some painters dropcloth, press it and double-sided tape it into position just to hold it flat on your surfaces as desired...
Then, rest your wooden frame structure in place (the sides/front/back of the "enclosure" that the top baffle will be screwed to).
Then, do your fiberglassing - glass the trunk well (you'll be sticking your pieces down to the plastic, of course), and make sure you fiberglass right up to and overlapping the MDF wooden structure - the resin will bond strongly with it.
Once the piece cures, it'll lift right out of the trunk (unless you went nuts with the double-sided tape :p ).
Flip it over, and rip the plastic off your cured piece - it'll come off like the backing on a sticker (but if you mixed your resin properly, won't be sticky like a sticker ;) ).
Pretty easy, really.
IF you want to mold a trunk LID - I'd suggest removing it - and plastic might work if you are really good with the doublesided tape - but I'd probably just tape over any holes and seams, and then use a mold release wax (car waxes actually work just as well, IMO - and are softer and easier to work with ;) ).
Fiberglassing upside down is asking for trouble.