Now the job is nearly complete I can reflect on what I have learnt about painting the steel roof of a narrow boat. I am sure there must be lots of other things that I am not aware of, that I will become aware of as time passes, but for now here is a bullet pointed list.
Do not work with your wallet in your pocket or be prepared to do and instant belly flop on the towpath to catch it as it gradually sinks into the murky depths.
Do not believe the claims for any mechanised paint stripping/sanding tools. If it’s serious enough to cut through the old hard gloss then it will also cut up the softer steel. Cup brushes, knotted wheels, flap wheels , overlapping discs don’t do it. A sharp one inch chisel is what one needs and about 300,000 scrapings to get the paint off 13 square metres of roof.
Do not believe that the wind blowing tree debris onto the roof is also strong enough to blow away the sanding dust, wear a properly fitting mask or suffer from a tight chest for several days.
Do not lean the extension cable reel up against the part of the generator marked “Warning, hot exhaust”
Do not blow insects or tree debris off the bit you are about to paint, they will end up on the bit that you just painted, no matter which way you blow them.
Don’t bother telling yourself not to knock over the thinners you have just put on top of the solar panel, that is just asking for that prophecy to be fulfilled.
Always work away from the power cords not towards them or risk the sander catching and trying to wind up the cord, as well as winding up yourself.
If you must get a generator make sure you are going to be able to get it onto the boat, by yourself.
Always keep a salvage magnet on board to retrieve the hand tools when you fumble their safety wrist strap knocking them overboard.
When taking off ones shoes to get on the roof, stay well away from the edge or at least one of them will end up treading water down the gap.
Try to get real, physical colour charts rather than relying on a computer image and description. “Light Admiralty Grey BS381 697” .. Light -yes, Admiralty ? Grey .. no, more baby powdery blue greenish. Oh well, it looks OK under the motorway bridge.
Always check with your fingers whether you have just re-coated a part of the roof before walking on it with woolly white socks.
Always start off by using masking tape rather than part way through once you have already wound yourself up by getting paint where is shouldn’t be. Otherwise the job will take longer and there will be remedial work to do.
Ensure you have ear plugs if you intend to try to sleep under an eight lane motorway, enjoy 3 am to 4 am, it’s the only sleep you will get.
Enjoy whatever company turns up, as long as it stays off the roof.
A motorway bridge does make quite a wind tunnel resulting is paint drying as it is being applied and debris blowing onto the roof. It did keep the sun and rain off.
With the quick drying paint it was worth having thinners and a brush to lay off the paint as it skinned quickly.
The matt applied with a roller produced a rough and uneven finish. For me this happens to be much better than the previous gloss because it will give me better grip for walking on without having the dirt holding capacity of a sand impregnated finish.
I should have thinned the primer and used two coats to reduce the roughness that was due to it drying too quickly.
I bought more than enough paint, therefore I will be going for a third top coat and will have some left for patching with the same baby powdery blue greenish shade. Rust treatment was Vactan, zinc oxide primer, top coat (also a anti rust primer and top) was Combi color from Rawlins, mixed to order and delivered next day, great service.