Tech­nique of the month

DIY filler paste for plas­tic kits

Model Rail (UK) - - Know Your Stuff -

Work­ing thick model filler into con­fined spa­ces or around del­i­cate de­tails with a typ­i­cal spreader tool can of­ten prove tricky. In­stead, we can cre­ate a thin­ner filler paste that can be ap­plied by brush with greater pre­ci­sion. Com­bin­ing liq­uid poly ce­ment and styrenebased fillers (such as those of­fered by Hum­brol, Rev­ell, Tamiya and Squadron) al­lows us to tai­lor the con­sis­tency to suit the job at hand. Fur­ther­more, the need for sand­ing later can be re­duced as the filler paste is ap­plied in a more con­trolled, neater man­ner. En­sure an overnight rest for the paste to cure fully be­fore sand­ing.

The thin putty paste can be brushed into awk­ward ar­eas, es­pe­cially wagon in­te­ri­ors or around del­i­cate de­tails. Deeper re­cesses may need a cou­ple of sep­a­rate lay­ers of putty, ap­plied when the pre­vi­ous ap­pli­ca­tion has dried.

Squeeze out a blob of model filler onto a scrap of card and, af­ter dip­ping a brush in liq­uid poly ce­ment, mix the putty un­til the re­quired con­sis­tency is achieved. Add more liq­uid poly to thin the putty fur­ther as de­sired.

The putty can be ma­nip­u­lated with a clean brush, dipped in the liq­uid poly ce­ment and drawn care­fully over the putty be­fore it has cured. Be­ware – the sur­face of the plas­tic will be soft­ened by the sol­vent.

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