build a bender or sweat lodge out of hazel or willow or other bendy wood (ha i said bendy wood!) cover with a tarpaulin, leaving an exit gap, run out an extension to use an oil filled electric radiator,within your "dome" get it hot in there, use a home built jig to hold the tank, out of scrap wood. then make sure you have on a charcoal filter mask, and primar, then leg it out, closing tghe flap of the dome you haVE MADE.......LEAVING THE HEATER ON, OPEN FLAP TO LET IT CLEAR, INSPECT TANK FOR FLAWS, FLAT IT DOWN WITH SCOTCHBRIGHT OR 600S GRADE WT And dry, used wet.....allow to dry completely, then go on with your colour,same again, close flap and allow to dry, apply stripes, then bring in house for twenty four hours in to the heat again, and then go back into pre-heated dome,scotchbright gently including stripes and then apply three TACK COATS OF LAQUER.
THEN WHEN TACKED OFF....A DOUBLE-HEADER OF LAQUER AND BOBS YOUR UNCLE DONE AND DUSTED. I AM A QUALIFIED SPRAYER BY THE WAY, SO IF YOU HAVE ANY PROBS THEN MAIL OR PM ME.