If the boards are 5" x5" or less then you could spin coat the boards, it gives a fairly nice coating.
see:
https://picasaweb.google.com/115378886522213655693/DYIPCBs?authuser=0&feat=directlinkCraig
--- In Homebrew_PCBs@yahoogroups.com, Alex Hun <alexhun19@...> wrote:
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> Been using the Seno 100 photo resist applicator to sensitize some pcb board stock. Main problem I find is getting an even coating. The applicator sponge is fed from a valve in the main body when you push down. If that happens you get flooded in resist but just before you are starved, so the coating tends to be very variable in thickness from board to board and also on a single board as the stuff tries so quickly it does not level very well.
> Only trick I found so far is to keep the resist in the fridge to slow down the evaporation process as much as possible.
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> Anybody got any other tips or tricks on how to get a good uniform, preferable thin, coating using this system?
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> Thanks
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> Alex
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