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We're on our way. Layer of black base coat. Allowed to cure to a tacky finish. Pro-finish applied in a V patern. Resin coat applied over the top. Vacuum bagged and allowed to cure overnight. Unbagged with no observable problems or faults. 15mm tow sprayed with a light coat of fusion-fix and allowed to set overnight to prevent fraying. Slight undulation of the tow. Next morning, layer of resin applied to pro-finish and allowed to set to set to tacky. Tow cut down to three rows, no problems with fraying. The tow was then positioned over the joint, and a coat of resin applied. Vacuum bag etc applied and vacuumed at about 40% vacuum which although lower than I have used in the past seemed to give a good shape to everything. Allowed to cure overnight. So far so good. Unbagged the layered assembly and this is where it went wrong. The resin over the tow, not the pro-finish, looked as though it had reacted with something although it had cured OK.
I’ve sanded it back so it’s (more or less ) flat, although it took a lot more work to said the tow back than the pro-finish. What did I do wrong?
Monday I’ll put the sticker on the tow and 4? Coats of resin over the whole lot with the previous layer at the tack stage.
Anybody able to offer advise or suitable insults.?
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