Make a fiberglass fan shroud
(→General Comments on Fiberglassing) |
(→General Comments on Fiberglassing) |
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'''Iso''' (made with isopthalic acid) bonds a little better than ortho but costs more and again ortho is fine for our tasks. | '''Iso''' (made with isopthalic acid) bonds a little better than ortho but costs more and again ortho is fine for our tasks. | ||
| − | '''Waxed resin''' - be sure you check whether you have 'laminating' or 'finsinh coat' resin. The former is just plain resin and is used for laying up several layers. Every layer will stick to the previous one very well. The latter contains a wax that floats to the surface of the finisned part and, if used in laminating layers, will prevent the layers from bonding causing part failure. These two resin mixtures are necessary. Polyester resin will harden all the way through except for the very outer surface | + | '''Waxed resin''' - be sure you check whether you have 'laminating' or 'finsinh coat' resin. The former is just plain resin and is used for laying up several layers. Every layer will stick to the previous one very well. The latter contains a wax that floats to the surface of the finisned part and, if used in laminating layers, will prevent the layers from bonding causing part failure. These two resin mixtures are necessary. Polyester resin will harden all the way through except for the very outer surface which is exposed to oxygen. This exposure prevents the resin from hardening and results in an irritating sticky feel to the surface. Using the waxed resin in the final layer allows the wax to float to the surface, insulate the surface from oxygen, allowing it to fully harden. I only use laminating resin and and sand off the outer surface or prime it which seals and hardens it. No biggie, don't worry about it, just be careful to not laminate with finishing resin! |
'''Gel coat''' - this is resin filled with a high solids usually colored pigment. It can either serve as a primered surface to be sanded and painted or as in the case of boats, can be the final colored finish. It is sprayed in a polished female mold without reinforcement, then 'glas is laminated on it. It is much softer than plain resin and works like a sanding primer. Good stuff. | '''Gel coat''' - this is resin filled with a high solids usually colored pigment. It can either serve as a primered surface to be sanded and painted or as in the case of boats, can be the final colored finish. It is sprayed in a polished female mold without reinforcement, then 'glas is laminated on it. It is much softer than plain resin and works like a sanding primer. Good stuff. | ||
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