Parallel lines stretched over the surface have the disadvantage that
stripes are left behind which need filling (at the thickish consistency
needed for lightweight run-free coatings) and also extracting the line
can spoil the surface if done carelessly.
An alternative is to tie the lines round the scraper at each end, and
lower it onto the wetted surface. One still gets stripes but they have
the absolute earliest chance of filling-in behind as you move. (High
hopes that they would disappear completely were not fulfilled.) Apart
---From not having to extract the lines it is also simple to go back and
repeat a small area, without involving laying in lines again, just
touching up the new short stripes it leaves. (Touching up what is left
of the stripes seems best done with a small piece of radiused card drawn
nearly flat along the stripe).
There are two further permutations of this scheme involving one fishing
line on the scraper and either a downstream or upstream line on the
surface but these do not seem to have any advantages.
gemin no.83
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