WEB Q&As

STAIN RE­MOVAL

Canal Boat - - Back Cabin - FAVOURS, via the CB HOB­BY­HORSE, CB

QHow do you re­move sun­screen residue which we have man­aged to get on the cabin paint­work? It has left white stains which ap­pear to be as dif­fi­cult to re­move as sil­i­cone. Would T-Cut work?

web­site TONY REPLIES... Try that and if it doesn’t work then try a fine rub­bing com­pound or cut­ting paste. For price rea­sons, you may be best off with an ‘own brand’. Take care and be gen­tle be­cause coach paint is far softer than car paint, so do not abrade all the paint away to the primer.

ATo be sure, you need to di­rect that ques­tion to the mak­ers, im­porters or dis­trib­u­tors. How­ever, a few com­ments that as­sume they are flooded lead acid cells.

Not so many years ago, the make-up of the lead al­loy used in many bat­tery plates changed so cal­cium is now used in pace of antinomy. This re­duced the amount of gassing so that, to­gether with a larger vol­ume of ‘ex­cess’ acid, means the need to topup is re­duced to such an ex­tent that the bat­tery is likely to die of old age be­fore top­ping-up is needed. That is pro­vided the max­i­mum charg­ing volt­age is

Anot ex­ceeded. The down­side is that when a bat­tery starts to fail, one or two cells will of­ten start to short cir­cuit in­ter­nally and those cells start to gas more. The eas­i­est way most boaters iden­tify a de­vel­op­ing prob­lem is when they find some dry cells.

If you do not check now and again, you will not know un­til you get a rot­ten egg smell and a failed bat­tery. By then there is some dan­ger of a cell ex­plod­ing, es­pe­cially if the bat­tery is left on charge unat­tended.

Check the cells at least once a year and more fre­quently if you have an ad­vanced charge con­troller. You should also check if there is any sign of the ends of the bat­tery bow­ing out or they are emit­ting a smell.

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