I bought some similar cloth at Boeing Surplus. When unrolled on the hull it was missing a couple crosswise threads in two places. After the wetout the flaws were visible but not awful, so I went ahead with the second layer. Again, after wetout they were not awful. The first fill coat made them nearly invisible, they only showed up in strong oblique light when viewed from exactly the right angle. The second fill coat made them go away altogether. This is not the exact same condition you describe, but may be of some help. Keep a squeegee handy, and check for buckles and darts every 20 min. or so, knocking them down as they occur. The light cloth is much tighter, harder to drape around compound curves, and fussier to wet out, but the upside is more strength for the weight.

: I purchased some 3.1 oz. satin weave cloth off of e-bay at what I thought was
: a great price. It came packaged very well and I left it such intill tonite
: where I was getting ready to glass tomarrow and I wanted to let the cloth
: lay over nite and loose some wrinkles.(best layed plans of mice and
: men.......) As I unrolled the cloth I noticed an area of the cloth that
: had runs in the weave every 14 inches or so along the whole length of the
: roll. This is going on the hull bottom and will be seen. Will it show when
: wet out? A second coat will be applied on the very bottom for skid marks,
: if I double over will it still show?I don't know it is possible yet,I will
: have to relay and measure the water line.
: Should I just save for the insides ?I have more bolts of cloth but they all
: came from the same source and may be of the same condition. When is a
: bargin not a bargin?
: Please let me know as I need to finish this boat a.s.a.p.,moving soon and I
: would like to glass tomarrow (great weather).
: Thanks everyone,
: Dave